How Soon After Ovulation Will Conception Occur?

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People who are trying to have a child will go to great lengths to increase their chances of achieving pregnancy.  One of the most commonly asked questions relating to this quest is  “ how soon after ovulation will conception happen”?

Keep in mind that it is almost impossible for conception to occur at any time during the month, other than a short time period after ovulation.

What is Ovulation?

According to Web MD, ovulation normally occurs about two weeks before a woman’s period, and is the process whereby a group of eggs begins growing into tiny sacs filled with liquid, which are called follicles. It is during this time that a woman is at her most fertile and able to conceive a child.

What is Conception?

Now that you understand what ovulation is, it is important to understand what happens during conception. Conception occurs when the sperm meets the egg and fertilizes the egg inside one of the fallopian tubes, thus producing a new life. After a few days, the fertilized egg will travel to the woman’s uterus where it will implant itself into the wall of the uterus.

The only time when there is an egg in the fallopian tube, is during ovulation. The egg has the ability to survive for up to 24 hours when it is in the fallopian tube. Some women are luckier, and the egg will survive for up to three days after ovulation, almost guaranteeing that conception will occur – although these cases are extremely rare.

The best chance of conception happens when the sperm meets the egg almost immediately upon ovulation.

Can I Conceive After Ovulation?

There have been cases where women think that they have fallen pregnant while on their period. This is more common with women who have extremely short cycles. What happens is that the female could start ovulating immediately after her menstrual cycle and still be bleeding while she is ovulating leading her to believe that she is still in one phase of her cycle when she has in fact already moved on to the next stage.

Another factor that can make it seem like conception happens after ovulation is when ovulation itself occurs later in the cycle than usual. There are plenty of reasons for this, such as illness, dietary changes, an increase in physical activity, and, of course, stress. Other factors that can make it look like conception has occurred after ovulation are, irregular cycles, stress, bad diet, and travel. Stress, diet, and travel all have an enormous impact on a woman’s cycle and can cause delays in ovulation. Ovulation can sometimes occur as much as a week later than expected due to these factors.

It can appear as if conception has occurred during your period, although this is quite rare. This is usually the case with very short menstrual cycles, where you could start ovulation right the very next day after you have done menstruating. On the opposite end, if your periods are longer, it could be that you are still bleeding long after you finish menstruation, and while you are actually ovulating.

If you have a typical 28-day cycle, try to conceive on the 10th, 12th, 14th, and 16th days of your monthly cycle because these are the optimum times for conception to occur. This timing will also account for later-than-normal ovulation as sperm can survive for up to five days in a woman’s body.

  • 3kids:)

    Iwas wondering I am 41 and have 3 children I seem to be pretty fertile as have quite a few pregnancies. I ovulated yesterday(13/03) and had unprotected sex on the 10/03 is there any chance that the sperm lived long enough to meet up and fertilise an egg?

    • earthsmagic

      Well, it is possible. Sperm can survive up to 5 days past ejaculation if all the circumstances were perfect. (Sperm health of your partner and the cervical mucus environment for you.)

  • robin

    I had sex on May 11 and May 18 my calendar says I ovulated between May 13-18. My average cycle is 31 days but there where 35 days in my last cycle. When did I concieve?

    • Vickie B.

      Unfortunately, since you don’t know when you actually ovulated, either of those days could have been responsible for your pregnancy. Ovulation only happens on a single day and how far pregnant you are would depend on the actual day you ovulated and not when you had sex.

      • nase

        is it the problem for someone with no constant time of menstrution?i mean ovulation cycle below 28 days?

  • Over45

    Is it common to have a faint trace of blood when you ovulate and is it to late to conceive when that happens?

    • Taylor

      No it is not uncommon. If you have cysts Your cyst could have burst when you ovulated. Same happened to me. And no you still have that 12-24 hr window before the egg dies.

  • joyeeta bhadra

    My period irregular ..after 40-45 days….i will try to conceive last february ..when my ovulatiton date..plz answer me…..

  • Stacy

    i had unprotected sex last night and this morning, today is my ovulation day
    i removed my right ovary 2 years ago
    can i still get pregnant??????

    • Vickie B.

      Yes as you can still ovulate from the left ovary. You might want to ask your doctor to be sure though as they are more intimately knowledgeable of your medical history.

      • Stacy

        They say it might be difficult but I was pregnant twice before
        But because of circumstances I miscarried
        And they weren’t planned

  • doll

    Im 33 years old and diagnosed with hydrosalpinx with mild dilation and free peritoneal spill and underwent iui 4 days back. I have been prescribed susten 200 and lupride injection. I feel dizzy after taking susten 200. What chances of pregnancy

    • Vickie B.

      Unfortunately, I don’t know. You might want to discuss this with your doctor.

  • Miranda

    I had sex with my boyfriend 4 nights ago. I ovulated on the 12th and had sex on the 13th. His cum went inside me. I start my period on the 26th. Could I be pregnant?

    • Vickie B.

      It’s possible as the egg can surivive 12 to 24 hours after ovulation. You should be able to take a pregnancy test on Sunday to find out if you are pregnant.

  • hheekna

    My last period was on the 1st of this month(may) I’ve had sex loads of times this month…..I’ve come on my period every 1st or 2nd of each month since I had my twins 4 months ago…Could someone help me out to when I might of been ovulating?? Thanks

  • Sharina

    I was wondering if I could be pregnant if I had sex on 5/13, 5/16, and 5/17. I track my periods and it said that my ovulation day was on 5/17. So is it possible I could have conceived??

  • Linda Elane Bestdefinedas Hous

    My dr said I ovulated on dec 22 2014 last period was on dec 8 so they say. I have 28 day cycles. I had sex on dec 24. But dec 22 would be incorrect information fron the dr since I had sex on the 24. So is it possible the dr may be wrong or is it still possible for me to get pregnant during the 24 since you said ovulation is the day tge egg would live. But I’m pregnant now. I need answers. But also as well I had sex on the 16th. Which sperm was it that caused this pregnancy

    • Vickie B.

      Most likely it would have been from the sex on the 24th.

      • Linda Elane Bestdefinedas Hous

        Thank you sooo much. I really needed to know because I had two partners and I’m committed to the second partner who I got with on the 24. And the 16 was the first partner. I’m thankful. Thank you so much.

  • nihar

    my wife had menstrual cycle in last month i.e. 6 May 15. i was out side since then. i came on 7 jun 15. we are having unprotected sex as it is safe period. however, till now my wife does not have her period. ee carried out a pregnency test on 16 jun 15, which is found to be negative. please. advise.

    • Vickie B.

      If she is missing her period, and the pregnancy tests are negative, you might want to visit a doctor to get a check up to find out what is causing the delay.

  • Vickie B.

    Unfortunately, it is hard to say what is going on. You had sex around the time you were ovulating so the chances of you being pregnant are there. If you have normal monthly periods, your period should be due around now. If it doesn’t start and your period doesn’t arrive, you should probably go and see your doctor.

    • Brandi Scott

      is the bottom ( june27 ) a positive ?

  • 4kids

    I was wondering could I get pregnant the the after ovulation? I ovulated the 13 and had sex on the 14th, could I be pregnant???

    • Abi

      Hi.. just being curious as I’m in the same situation. Did u get pregnant by bd-ing the next day of ovulation? I’m dying to know. Thanks

  • Bobbs99

    Hi. I ovulated (according to digital test) from the 18th -20th July and had unprotected sex on the 18th. When would implantation occur if I conceived?? And, when would I be able to test for pregnancy? Thanks

  • Taylor

    My period started june 16 & ended on the 19th of june….i had unprotected sex on the 22 and my cycle length is 25 days. I track my cycle and it says my fertile days were june 22nd-28th & ovulation day was june 27. I had sex on july 1st protected but the condom popped & we were unaware til after. I took a pregnancy test mid-day on july 13th & got a faint positive & then a morning test on july 16th & got a bright positive….is there a way to determine which sexual encounter caused this pregnancy

    • MRsJO24

      If your ovulation date is correct, then the encounter on the 22nd would be the one that lead to pregnancy, since your egg would have died before the encounter on July 1st. But this assumes that you did in fact ovulate on the 27th. There is always room for error when using an ovulation predictor app, or any other method of tracking that has somewhat broad guidelines for ovulation prediction. Even if you ovulated the 26th or 28th, it would still be more likely that the 22nd was the encounter leading to pregnancy.

  • Brandi Brinson

    Im really needing help IM not sure when I ovulate and my last period was July 17th and the ovulation calendars say i ovulate the 16th I have unprotected sex everyday and my boyfriend ejaculates in me almost every time I took a PT friday but I think that would be to soon do you know if its possible to be pregnant we are really wanting to start a family

    • Vickie

      Your dates seem to be off. If your last period started on the 17th and you have a 28 day cycle, you would have been ovulating around July 31st. Your period would be due around the 16th or so. If you had sex around the 31st, you have the chance of getting pregnant.

  • Brandi Brinson

    I also had an ectopic about 2 and a half months ago

  • JRFR

    We are hoping we nailed a baby this time! What do you guys think ?!

    Last menstural ending date ; August 12
    Lovey Dovey days ; August 15-17
    Fertile according to my app ; 13-23
    Ovulation day ; August 19th
    Next menstural starts ; September 5th

  • Deborah

    My last period was July 4th 2015 ovulated on July 18th I have sex on July 17 and July 18 he ejaculated I missed my period it’s 19 days late but I ovulated again onAugust 15 and had sex on August 15 & technically very early on 16. Should I take a pregnancy test now or wait until I miss another period?

    • Randi

      If your period is 19 days late… then yes you should take a pregnancy test.

  • toya

    My conception was on the 24 of June same day of ovulation I had sex on the 21 22 23 and 24 so what day did I get pregnant

    • Starquitta White

      Yours sound just like my question

  • MIMI

    Please help. It is 9/3/15 and I tested positive for a pregnancy test, but I just had my period on 8/21/15….im confused and lost. I thought if I concepted then I wasn’t supposed to get another period. So how am I pregnant? When did I get pregnant??

  • Keisha

    Last period was August 28th ended September 1st when did I ovulate?

  • samantha


    I am TTC for a few months now my periods are as follows July 5, July 31, Aug 26, Sept 19. Since the amount of days in my cycle each month change how do i know when i ovulate as each month my cycle could be shorter or longer by a few days. For September my period was on Sep 19 ended Sept 23. Ovulation Calculator says my fertile window was Sept 26- October 1 as it say i have and average of 25 days in cycle. I had sex on Sept 24, Sept 26, 27,28,30 October 1,4 & 5. What are my chances of catching ovulation ? really trying to conceive. Could i be pregnant? next period should be around October 14 per period tracker. I do not have any signs that i know of to show that i did conceive. when would i start to notice them?

  • ben tri in

    I have been ttc for a while now. every month i believe i have and then I havent. this month is different. I have been seriously wathcing my 36 day cycle and i feel as tho i am. my question would have to include that I have had regular sex with my husband at least every other day, i get pain when my egg is being released, and then have breast tenderness, all of this has occurred this month but for the past three days i have had excruciating pain in my pelvic area, sometimes on one side, sometimes throughout but it is nonstop. is this normal for indicating conception and pregnancy?

  • Annah

    Hi, my boyfriend and I are trying to decide what day we conceived on. We had sex the 8th of October, and again on the 11th. We are due the 2nd of June. What date more likely caused the pregnancy?

    • Annah

      I meant the 2nd of July

  • staey

    Hi I had miscarriage in September. I was only 3 to 4 weeks I got my period in October it was 4 days late so this is November am due my period in 6 days I did ovulation. Test stripes last monday I got postive then got the usal u get with ur cervix. I started drying up on the Thursday it did the dead on 10th 14th 15th I have between 28 to 29 on cycle can I get pregnant

Last modified: May 10, 2014