The latest male fertility research reveals how your relationship length plays a role in pregnancy—and his best swimmers aren't waiting for him to settle down!

By Rachael Schultz
Updated: August 05, 2015
Corbis Images

When you think about starting a family, you probably imagine having that conversation with someone you've been dating-or at least have known-for a while. But it turns out your best chances of getting pregnant may actually be with the guy you just met.

A new study in Evolutionary Psychological Science found that men produce higher quality sperm with a new partner compared to when they're aroused by someone they've been laying eyes on day after day. (See: 8 Questions to Ask Before Having Sex with Him.)

Researchers had men watch and-erm-react to sexually explicit videos for 15 days straight. Six of the seven videos had the same actress and actor, while the last offered a new copulating couple.

The men didn't become habitualized to the same ol' faces like one might expect. It took each guy relatively the same amount of time to finish the first time they watched one of the six similar videos to the umpteenth time they enjoyed it.

The men did, however, finish faster when they were introduced to the new video full of fresh faces. And when the researchers analyzed the men's ejaculate, they found that the guys were actually producing higher quality sperm after this seventh, novel video. The quantity, movement, and structure-all crucial factors when it comes to sperm health-were improved with the new sexual stimuli. (Want to add the novelty back into the old game? 9 Ways to Sex Up Your Relationship.)

The researchers think the potential factors at play all have to do with man's most primal and basic purpose-to sow his seed and further the human race. Hypothetically, the guys had already attempted to fertilize the eggs of the woman in the first six videos, so they didn't need to keep giving away the primo prize. There's also the idea of sperm competition, or the drive to deposit your sperm into as many reproductive banks as possible. Delivering the highest-quality sperm as quickly as possible to a new woman-even on a screen-would increase a guy's chances of furthering his genetic line, the researchers hypothesize.

What does this mean for the couples who have been together forever and are now trying to optimize their chances of conceiving? Obviously, the lack of novelty doesn't affect his sperm health too much-otherwise all babies would only be coming from reckless one night stands. And you can try and decrease other sperm-slaying factors, like stress, red meat, and too tight tighty-whities. Studies have found that scoring enough sleep and eating a diet rich in a-linolenic acid (like walnuts) and carotenoids (yellow- and orange-colored fruits and vegetables) can help boost the health of your guy's swimmers, so there's no need to stress if you've been together forever and are just starting to try for a baby.

More importantly, is what this means for all the single ladies: If that cute guy you just laid eyes on has healthier swimmers now than he will after five years with you, that's even more reason to be strict about using protection.

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Comments (23)

Anonymous
March 8, 2019
I am Dr Mike, I welcome you all to my world of spiritual temple of solution. I want to assure you that what so ever you contact me for will come to pass with the powers of my ancestors. I want to let you know that I am here to help you in any problem you might be facing. I have been in the field of helping people for over 36years now and I want to let you know that I have helped solved over 7000 people with so many problems in different countries and they have never stopped calling me to thank me for the good work I have done for them. My good work has spread to so many countries, and that is because they have seen my good work and they helped me spread it all over to the whole world. I want to let you know that the moment you contact me just consider all your problems solved because I know that once I commence on your spell work you are going to testify to the whole world here Are you passing through any of these problems, DO YOU NEED YOUR EX BACK VERY FAST DO YOU WANT YOUR LOVER TO LOVE YOU AS NEVER LIKE BEFORE ARE YOU SUFFERING FROM A LONG TIME SICKNESS ARE YOU FACING FINANCIAL PROBLEMS ARE YOU SEEKING FOR A GOOD JOB DO YOU WANT TO BECOME A HOUSE OWNER ARE YOU LOOKING FOR A FIRST CLASS GRADE DO YOU WANT TO COME OUT FIRST IN YOUR EXAMS ARE YOU A STAR AND YOU WANT TO BE SO POPULAR TO THE WHOLE WORLD DO YOU WANT TO BE RICH DO YOU WANT YOUR BUSINESS TO KEEP MOVING DO YOU HAVE A COMPANY OF ANY KIND AND YOU WANT IT TO EXPAND DO YOU WANT YOUR HUSBAND OR WIFE TO KEEP TO YOUR WORLD ARE YOU FACING ANY MARITAL PROBLEMS ARE YOU FINDING IT DIFFICULT TO GET PREGNANT FOR YOUR HUSBAND ARE YOU EXPERIENCING MISCARRIAGES ANY TIME YOU TAKE IN DO YOU WANT TO COMPETE IN ANY LOTTERY GAME ARE YOU FACING HARDSHIP HAVE YOU BEEN THREATENED BY SOMEONE DO YOU WANT TO BE SUCCESSFUL IN ANY THING YOU LAY YOUR HANDS ON IS YOUR SON OR DAUGHTER BEHAVING STRANGELY ARE YOU FACING WITCH CRAFT MANIPULATIONS DO YOU WANT TO CAST A STRONG LOVE SPELL ON YOUR GIRL OR BOY FRIEND DO YOU NEED MAGIC POWERS TO DO ANY THING YOU WANT ARE YOU FINDING IT DIFFICULT TO CHOOSE A LIFE PARTNER DO YOU WANT YOUR PARENTS TO BE PROUD OF YOU ARE YOU EXPERIENCING FAILURE AND DISAPPOINTMENT IN ANY THING YOU DO. (ETC) If you are facing any of these problems all you just need do is to contact me via email and it will be handle with full force and with my oracle and ancestors beside me I want to have you testify just the same way other people did that I have helped. Do not suffer in pain and silence email me so that your problems will be solved by me with full speed. I want welcome you again to my spell temple. If you have any problem that you want my help for just email me and immediately it will be solved. E-mail me at: anyspellcaster@gmail.com
Anonymous
February 25, 2019
An amazing testimony on on how i conceive, also cure from fibroid, i wonder why people still don't believe that roots and herbs are very essential and fruitful in different aspect, especially when you can't conceive and bear children. I am a living witness because I tried all I could to be pregnant but all to no avail, on this faithful day, i decided to check the net for updates on healthy living and i came across testimonies of lot of women who Priest Babaka has helped with his native herbs to conceive. i decided to put a try because this has been my greatest problem in life so I emailed Priest Babaka, and he told me what to do which i did, after which he sent me some roots and herbs syrup and gave me step by step guild lines on how and when to have sex with my man. I missed my menstrual flow within a short period of taking it, and the doctor confirmed that I am pregnant. I am very glad to tell the world that I just put to bed a bouncing baby boy last week. Contact Priest Babaka for your own testimony via Email: babaka.wolf@gmail.com Or Facebook at priestly.babaka
Anonymous
February 25, 2019
An amazing testimony on on how i conceive, also cure from fibroid, i wonder why people still don't believe that roots and herbs are very essential and fruitful in different aspect, especially when you can't conceive and bear children. I am a living witness because I tried all I could to be pregnant but all to no avail, on this faithful day, i decided to check the net for updates on healthy living and i came across testimonies of lot of women who Priest Babaka has helped with his native herbs to conceive. i decided to put a try because this has been my greatest problem in life so I emailed Priest Babaka, and he told me what to do which i did, after which he sent me some roots and herbs syrup and gave me step by step guild lines on how and when to have sex with my man. I missed my menstrual flow within a short period of taking it, and the doctor confirmed that I am pregnant. I am very glad to tell the world that I just put to bed a bouncing baby boy last week. Contact Priest Babaka for your own testimony via Email: babaka.wolf@gmail.com Or Facebook at priestly.babaka
Anonymous
February 6, 2019
You need help to GET PREGNANT? contact Dr Aboki on this email (pregnancysolutionhome@gmail.com), i am here to share my testimony on HOW I CONCEIVE my baby after i suffer from PCOS and my TUBES ARE TIED, i have been married to my husband for 11 years without no issue. i had problems with my in-laws even my husband started to have new affairs aside our marriage. it was a very terrible thing to bear. i became a laughing stock among my pear, i prayed and fasted and nothing happened, been to many doctors and yet my case remain the same, i was now seen as always unhappy. i was even ready to pack out of my marital home and stay on my own because my husband was not given me any attention that i needed from him. i decided to focus on my job and try to live happy on my own. on this faithful day, i decided to check the net for updates on Trying To Conceive with pcos and my tubes are tied, and i came across a story of a woman who Dr aboki helped to conceive a twins baby under same condition as mine. so i decided to put a try because this has been my greatest problem in life. today i am a proud mom with two son. words will not be enough to explained what this man did for me. i am a happy mother,i know there is someone in same condition and you feel there is no way. i urge you to contact him. This man is the best solution to every single mother around the globe. distance is not a barrier, he will surely make your dreams come through. contact him today via email: pregnancysolutionhome@gmail.com
Anonymous
January 30, 2019
HOW Priest Ade FERTILITY SPELL WORK SO GOOD AND PERFECThttps://ancientspiritspellcast12.wordpress.com Hello my name Lena i want to testify of a mighty and great spell caster called Priest Ade,I had difficulties getting pregnant due to chronic medical illness this got me so worried and sad my husband wasn't happy with it and one night he came back home angry he told me he wanted to be a father and since i couldn't make him that he has decided to marry someone else and divorce me i was devastated and cried all night was afraid i would end up in the hospital kept thinking about the good times we had together and how much i was going to miss him, i was looking for something online when a message pooped up concerning this great spell caster and how he have helped so many in similar problems i thought about it for some time and decided to give him a try when i contacted him he told me that after 24 hrs my husband will be back and i will be pregnant i did everything he asked me to do, to my greatest surprise the next day it was my husband back home he knell down begging for forgiveness and he canceled the divorce,4 week after the doctor confirmed that I'm pregnant I'm so happy, he can help you as well contact him at.ancientspiritspellcast@yahoo.com or ancientspiritspellcast@gmail.com Blog http://ancientspiritspell.blogspot.com Website http://ancientspiritspellcast.website2.me WhatsApp +2347059715465
Anonymous
January 14, 2019
My husband seek for divorce and i see no reasons which i knew its for those [filtered] out there for almost 4 years and i tried all i could to have him back cos i really loved this man so much but i made a vow ain't gon lose him to any [filtered]. Sadly all my effort didn't work out.. We met at our early age in college and we both have feelings for each other and we got married happily for 5 years with no kid and he woke up one morning and told me he’s going on a divorce, i thought it was a joke and when he came back from work he tender to me a divorce letter and he packed all his belonging from my house and left. i was devastated and i tried all i could to have him back but all did not work. i was lonely for almost 4 years, So i contacted a man who says he is a spell caster and i told the spell caster what happened he said he will help me and he asked for his full name and his picture. i gave him that. At first i was skeptical but i gave it a try cos i have tried so many spell casters and there is no solution, so when he finished with the readings, he got back to me that he’s with a woman and that woman is the reason why he left me, The spell caster said he will help me with a spell that will surely bring him back, but i never believe all this he told me i will see a positive result within 3 days. 3 days later, he called me himself and came to me apologizing and he told me he will come back home. i can't believe this, it was like a dream cos i never believe this will work out after trying many spell casters and there is no solution. The spell caster is so powerful and after that he helped me with a pregnancy spell and i got pregnant a month later, we are now happy been together again and with lovely kid. This spell caster has really changed my life i will forever thankful to you, Doc Muna helped many of my friends too with similar problem and they are happy and thankful too. This man is indeed the most powerful spell caster i have ever experienced in life. Am Posting this to the Forum in case there is anyone who has similar problem and still looking for a way out. you can reach him EMAiL: marvelspelltemple @ gmail. com
Anonymous
December 1, 2018
This is just more evidence that monogamy is not a natural state for human males and is imposed on them by females.🤔😁
Anonymous
November 22, 2018
Hi everyone, I'm here to publish the good work of Doctor Zakuza. It's been hell since when i got divorced by my husband for iv'e been so heart broken and lonely. My husband left me for his mistress and the whole thing got me stressed out that it affected me at my place of work for i couldn't concentrate anymore. I searched and looked for help from friends and family but no one could get an answer to my problem not until i was referred to Doctor Zakuza by my Neighbour. I got in touch with the Doctor and i opened up everything to him and the Doctor gave me words of hopes and promised me that my husband will come back to me within 12 to 16 hrs. I followed all instructions the Doctor gave me and behold my husband came back to me within 12 to 16 hrs has the Doctor has promised and my husband has been so faithful, lovely and honest. I must say that this is a miracle for I've never had an experience with such before and it really worked out for me. To viewers out there who seeks for any help can get in touch with the Doctor. He's truly Indeed a God on Earth. Website: http://doctorzakuzaspelltemple.website2.me, Email: doctorzakuzaspelltemple@yahoo.com
Anonymous
November 20, 2018
My Husband divorce me for no reason, Thanks to Dr.FREEDOM for bringing back my husband,and brought great joy to my family once again, My name is Alberto Stephanie. i live in US, I`m happily married to a lovely and caring Husban,with two kids A very big problem occurred in my family seven months ago,between me and my husband so terrible that he took the case to court for a divorce he said that he never wanted to stay with me again,and that he did not love me anymore So he packed out of belongings from his house and made me and my children passed through severe pain. I tried all my possible means to get her back,after much begging,but all to no avail and she confirmed it that she has made her decision,and she never wanted to see me again.on a faithful evening,as i was coming back from work,i met an old friend of mine who asked of my Husband So i explained every thing to him,so he told me that the only way i can get my husband back,is to visit a spell caster,because it has really worked for him too So i never believed in spell,but i had no other choice,than to follow his advice. Then he gave me the email address of the spell caster whom he visited. So the next morning,i sent a mail to the address he gave to me,and the spell caster assured me that i will get my wife back the next day what an amazing statement!! I never believed,so he spoke with me,and told me everything that i need to do. Then the next morning, So surprisingly, my husband who did not call me for the past seven {7}months,gave me a call to inform me that he was coming back it all seems to be a dream,but it was all reality and my heart was full of joy,that was how he asked me to come back home that same day,with lots of love and joy,and he apologized for his mistakes,and for the pain he caused me and my children. Then from that day,our relationship was now stronger than how it were before,by the help of a spell caster.So i will advice you out there to kindly visit the same Doctor ,if you are in any condition like this,or you have any problem related to "bringing your ex back. Thanks you sir, for bringing back my husband,and brought great joy to my family once again. His spell is a 100% Guarantee for your situation,if you are in a relationship without kids Dr Freedom can also help you. Email him now. freedomspellcast@gmail.com or reach him on WhatsApp +2348070670337.Good luck as you cantact Dr Freedom today because he is indeed a problem solver.
Anonymous
October 23, 2018
This great man called Priest Babaka of babaka.wolf@gmail.com helped me with a pregnancy spell. i have been married for the past 9year without a child i and my husband has went for many check up but the Doctors always bring positive result that we are okay, we have been hoping that we will get bless one day but every day just look the same i always touch my stomach but nothing happens. But with the great help of Priest Babaka i have have my first baby this year April 22 2014 i am really thankful for the great help he render to me in case you need his help just email him on : babaka.wolf@gmail.com for help
Anonymous
October 7, 2018
I want to use this opportunity to thank this great holy man called Priest Babaka for what he has done for me and my family. This great man has brought happiness and joy back again to me and my family. Priest Babaka has used his great power to help me bring back my husband within the period of 48 hours and also helped me in getting pregnant with his powerful prayers and after 7 days of applying his herbs.This is more than words can say, at first i didn't believe it but today it is so true and all thanks goes to him. i will advice every one out there that has a similar issue, and also any one who is willing to get his or her lover back and any one who wants to get pregnant quick to contact this wonderful man today and forever remain happy in life. email: babaka.wolf@gmail.com or Facebook at priestly.babaka
Anonymous
October 7, 2018
I want to use this opportunity to thank this great holy man called Priest Babaka for what he has done for me and my family. This great man has brought happiness and joy back again to me and my family. Priest Babaka has used his great power to help me bring back my husband within the period of 48 hours and also helped me in getting pregnant with his powerful prayers and after 7 days of applying his herbs.This is more than words can say, at first i didn't believe it but today it is so true and all thanks goes to him. i will advice every one out there that has a similar issue, and also any one who is willing to get his or her lover back and any one who wants to get pregnant quick to contact this wonderful man today and forever remain happy in life. email: babaka.wolf@gmail.com or Facebook at priestly.babaka
Anonymous
September 10, 2018
contact (pregnancysolutionhome@gmail.com) if you are TRYING TO CONCEIVE, I never thought I'd be writing this message but after 5 years of and nearly lost my marriage due to not be able to have a child after i suffer from PCOS and my TUBES ARE TIED, severe endometriosis and scanning, I was told that IVF was the only option. This was something we could not afford and had almost given up hope of becoming parents. A friend of mine recommended DR Aboki to me and persuaded me to contact her, she did a spiritual breakthrough for me to make me GET PREGNANT, within 2 weeks I was pregnant (naturally!!!) and gave birth to a healthy twins in february. I am writing this message for those women who are at the stage I was at, depressed with no light at the end of the tunnel. give DR Aboki a try to help you solve your problem, and hopefully you'll have the same success that I have had. Here is her email address (pregnancysolutionhome@gmail.com) . wish you all happiness in your marriage.
Anonymous
June 18, 2018
Hello everyone my names is Shari i want to testify of a powerful man called Dr Great and how he helped me get pregnant, I and my husband have been married for 10 years now without a child to call our own i have done everything i can but still couldn't get pregnant this was eating me up inside i was always ashamed whenever i and my husband go out because i see him playing with other children because he love kids so much one day when we got home i was crying bitterly i just couldn't bear it anymore i went online to look for fertility treatment when i saw someone testify of his great work and how he have help many in problems with his spell i decided to give him a try i contacted him through his email he assure me that it will take 24 hrs to cast the spell and i will be pregnant, 5 weeks after i felt ill so i went to see the doctor he confirmed that i was pregnant all thanks to this powerful spell caster Dr Great you are indeed a great man now i believe that there is no problem without a solution he can also help you contact : infinitylovespell@gmail.com
Anonymous
June 18, 2018
Hello everyone my names is Shari i want to testify of a powerful man called Dr Great and how he helped me get pregnant, I and my husband have been married for 10 years now without a child to call our own i have done everything i can but still couldn't get pregnant this was eating me up inside i was always ashamed whenever i and my husband go out because i see him playing with other children because he love kids so much one day when we got home i was crying bitterly i just couldn't bear it anymore i went online to look for fertility treatment when i saw someone testify of his great work and how he have help many in problems with his spell i decided to give him a try i contacted him through his email he assure me that it will take 24 hrs to cast the spell and i will be pregnant, 5 weeks after i felt ill so i went to see the doctor he confirmed that i was pregnant all thanks to this powerful spell caster Dr Great you are indeed a great man now i believe that there is no problem without a solution he can also help you contact : infinitylovespell@gmail.com
Anonymous
June 14, 2018
I don't know how I am going to say this testimony or even start. I am from USA. Last week, i was online looking for ways to get pregnant naturally and i stormed over a testimony written by Jennifer online about this great spell caster who was able to bring her ex husband back to her and I said to myself, "was this the right spell caster to contact if i want to get pregnant"? All the same I contacted him. I have not said his name because I am very happy to be one of his clients that has been helped by him and that means I am confirmed 3 days pregnant with fertilized eggs in my womb. The doctors confirmed me pregnant this morning and that is why i come online to write about this. Contact Doctor Odunga today at odungaspelltemple@gmail.com for he is the best caster and his time duration is accurate.
Anonymous
June 14, 2018
I don't know how I am going to say this testimony or even start. I am from USA. Last week, i was online looking for ways to get pregnant naturally and i stormed over a testimony written by Jennifer online about this great spell caster who was able to bring her ex husband back to her and I said to myself, "was this the right spell caster to contact if i want to get pregnant"? All the same I contacted him. I have not said his name because I am very happy to be one of his clients that has been helped by him and that means I am confirmed 3 days pregnant with fertilized eggs in my womb. The doctors confirmed me pregnant this morning and that is why i come online to write about this. Contact Doctor Odunga today at odungaspelltemple@gmail.com for he is the best caster and his time duration is accurate.
Anonymous
June 9, 2018
Hi! Some couples seem to get pregnant simply by talking about it. For others, it takes time. You are probably, you want to know how pregnancy happens and how to conceive naturally. You are probably looking for the quickest and easiest way to get pregnant without interventions. The first thing you can do to get pregnant and to have a healthy pregnancy is to be physically healthy. It is important to not be over or under weight, both of which have negative effects on fertility and healthy pregnancies. This program => http://infertilityinwomen.com <= (Google it) focuses on a 100% natural method for getting pregnant quickly. That means there aren't recommendations for harsh prescription drugs or surgeries with nasty side effects. It is honestly for everyone. Even women without fertility issues.
Anonymous
May 24, 2018
Thank you DOCTOR ODUNGA for making me fertile after 22 years of marriage. I am a barren woman, in fact now its, I was a barren woman. I say this testimony in regards of Doctor Odunga who granted my wish after 22 years of marriage. No one of my people and friends or family believed i would ever get pregnant not to talk of giving birth. Now i am a mother of twins? I am indeed the most happiest woman to say this testimony for everyone to read. I am Eunice Stein. I am 54 years of age. This is my first writing on the net about anything this serious especially as for 22 years i have not been for once pregnant since i got married to my husband. Please, do you need help with your fertility problem? CONTACT DOCTOR ODUNGA. Do you need your problem solved such as getting your ex back? CONTACT DOCTOR ODUNGA. He is the solution to all your problem. His online email is odungaspelltemple@gmail.com and he will solve all your problems
Anonymous
May 23, 2018
I believe God would make you fertile when he pleases. I am so happy to say this. I have suffered from infertility for 6 years of my marriage. I have gone to so many therapy, taken so many medication I lost count of medication i took. but my colleague at the office introduced me to mother Iya, about her herbal remedy, her type of medication and after using it , its effectiveness. after taking it for 1week, I conceived and I gave birth to my little boy, he is 3years old now and I am pregnant again big thanks to colleague for introducing me Mother Iya you can contact at her on nativeiyabasira@yahoo.com and +441133201124, if you do seek permanent solution as well.
Anonymous
May 22, 2018
Many people have wrote articles of how they were helped by a spell caster but I am very grateful to this great spell caster who brought my ex husband back to me. This testimony is a true story and my name is Jennifer Sanchez. When i came in contact with this man was also through a testimony written about him and i have also encountered many testimonies about how he has been helping others with their life. To get back with an ex is one of the most inner most feeling many people would love to experience especially as those memories with our ex always cloud our mind when someone else does some of those things our ex used to do. I was a single parent for almost 6 years and though my ex husband was far away from my kids i still wish someday he will return back to me. This spell doctor i encountered known as Doctor Odunga helped me with my wishes and i am happy to say that i am back with my ex husband and i am very happy sharing the testimony with everyone so that they too can meet this great doctor and solve their problems. I don't know what others might feel about getting their ex back in their life but i always know there is a blessing in disguise with just a single reconnection with an ex. If you want to successfully get back with your ex, contact this great spell caster at odungaspelltemple@gmail.com and share an awesome testimony too just like me.
Anonymous
April 30, 2018
Many people have wrote articles of how they were helped by a spell caster but I am very grateful to this great spell caster who brought my ex husband back to me. This testimony is a true story and my name is Jennifer Sanchez. When i came in contact with this man was also through a testimony written about him and i have also encountered many testimonies about how he has been helping others with their life. To get back with an ex is one of the most inner most feeling many people would love to experience especially as those memories with our ex always cloud our mind when someone else does some of those things our ex used to do. I was a single parent for almost 6 years and though my ex husband was far away from my kids i still wish someday he will return back to me. This spell doctor i encountered known as Doctor Odunga helped me with my wishes and i am happy to say that i am back with my ex husband and i am very happy sharing the testimony with everyone so that they too can meet this great doctor and solve their problems. I don't know what others might feel about getting their ex back in their life but i always know there is a blessing in disguise with just a single reconnection with an ex. If you want to successfully get back with your ex, visit this website odungaspelltemple.wordpress.com or contact this great spell caster at odungaspelltemple@gmail.com and share an awesome testimony too just like me
Anonymous
February 19, 2018
I never thought I'd be writing this message but after 4.5 years of and nearly lost my marriage due to not be able to have a child, severe endometriosis and scanning, I was told that IVF was the only option. This was something we could not afford and had almost given up hope of becoming parents. A friend of mine recommended native doctor iya basira to me and persuaded me to contact her, she did a spiritual breakthrough for me to make me get pregnant, within 3 weeks I was pregnant (naturally!!!) and gave birth to our son in april. I am writing this message for those women who are at the stage I was at.depressed with no light at the end of the tunnel. give iya basira a try to help you solve your problem, and hopefully you'll have the same success that I have had. Here is her email address nativeiyabasira@yahoo.com . wish you all happiness in your marriage.