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How Long Does an Egg Live After Ovulation? What It Means for Pregnancy

ByDr. Furqan Aamer
Updated: 3 Oct 2026, 9:00 am
Medically Reviewed by Dr. Pooja C Thukral, Senior Consultant – Gynecologist | Associate Director- Cloudnine Hospital

Sperm can survive in the female reproductive tract for up to five days, but an egg lives for only 12 to 24 hours after ovulation. Knowing this difference is key to timing intercourse correctly for conception.

Pregatips
An egg lives for 12 to 24 hours after ovulation before it breaks down and is absorbed by the body. Ovulation happens when a mature egg is released from the ovary and travels into the fallopian tube, where it must meet a sperm within this short window for fertilisation to occur. If fertilisation does not happen in this time, the egg will not result in pregnancy that cycle. Because sperm can survive inside the female body for up to five days, timing intercourse before ovulation improves the chances of conception more than timing it after.
In this article:

How Long Does an Egg Survive After Ovulation?

Once released from the ovary, the egg is viable for 12 to 24 hours. It moves into the fallopian tube, where fertilisation takes place if sperm is present. Past this window:

  • The egg degenerates
  • It can no longer be fertilised
  • The body naturally absorbs it if pregnancy does not occur
This is unrelated to the menstrual cycle length; it stays constant across cycles. An unfertilised egg breaks down within a day of ovulation. It does not travel to the uterus intact. The hormone levels shift as the corpus luteum (the structure left behind after the egg is released) stops producing progesterone if pregnancy does not occur. This drop in progesterone triggers the uterine lining to shed, starting the next period around two weeks later.

What Is the Fertile Window?

Although the egg survives for only one day, the fertile window is much longer because sperm live longer than the egg.

The fertile window includes:

  • Five days before ovulation
  • The day of ovulation
  • Up to 24 hours after ovulation
The highest chance of pregnancy occurs when intercourse takes place one to two days before ovulation or on the day of ovulation. During this time, sperm are already waiting in the fallopian tube when the egg is released.

Does Egg Lifespan Change With Age or Health Conditions?

The 12 to 24-hour survival window itself does not change with age. However, egg quality declines with age, especially after 35 years and with conditions such as PMOS or thyroid disorders.

Lower egg quality can:

  • Reduce the chances of fertilisation
  • Increase the risk of miscarriage
  • Make conception take longer
A peer-reviewed analysis of National Family Health Survey (NFHS) data found that secondary infertility in India rose from 19.5% in 1992–93 to 28.6% in 2015–16, with age at marriage and lifestyle factors strongly linked to the trend. This makes it more important to track ovulation accurately rather than assume a fixed cycle date.


How to Improve Your Chances of Getting Pregnant

If you are trying to conceive, timing matters. Experts generally recommend:

  • Have intercourse every 1 to 2 days during the fertile window.
  • Do not wait until after ovulation.
  • Use ovulation predictor kits if your cycles are regular.
  • Maintain a healthy weight and balanced diet.
  • Avoid smoking and excessive alcohol.
  • Manage medical conditions such as thyroid disorders, diabetes, or PMOS.
Regular intercourse throughout the fertile window provides the best chance of having healthy sperm available when the egg is released.

If you are under 35 years and have been trying to conceive for 12 months without success, or for 6 months if you are 35 years or older, it is advisable to seek fertility evaluation.

Understanding that the egg survives for only 12 to 24 hours after ovulation shows why timing intercourse before ovulation, rather than after, gives couples the best chance of conception.

You’re not alone in your journey when trying to conceive. Join our supportive community to connect with others, share experiences, and find encouragement every step of the way.

FAQs on How Long Does an Egg Live After Ovulation? What It Means for Pregnancy

  1. Is the day after ovulation still fertile?
    It can be, but only if the egg is still alive. Fertility drops sharply after the first 24 hours.
  2. Does PMOS affect how long the egg survives?
    No. PMOS affects the regularity and timing of ovulation, not how long the egg survives after release.
  3. What is the best day to conceive in a 28-day cycle?
    For a typical 28-day cycle, ovulation occurs around day 14; intercourse between days 10 and 14 offers the highest chance of conception.

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