How Long Does Ovulation Last?

by | Oct 7, 2019

Trying to conceive and/or avoid pregnancy is a complicated task in many cases. Because timing is a crucial part of the contraception process. If you’ve been planning for pregnancy, ovulation is a term you’ve probably heard numerous times. At the time of ovulation, eggs are released from the ovary, giving access for sperm cells to fertilize them.

How long does ovulation last


You might notice an egg white discharge upon ovulation, which is also known as cervical mucus. Knowing the time and length of your ovulation and cycle can help increase your chances of pregnancy.


How Long Does Ovulation Last?

Ovulation lasts 12-14 hours during each menstrual cycle. When the luteinizing hormone surges, it causes a mature egg to exit the ovary, then travels through the fallopian tube. The egg survives for up to 24 hours, then it dissolves into the uterine lining. However, if the egg is fertilized by the sperm it may result in pregnancy.


Determining the Best Time to Have Sex to Conceive

Fortunately for those trying to conceive, the fertility window is longer than 12-24 hours. Semen can survive in a female’s reproductive tract for up to five days. Therefore, intercourse during five days leading to ovulation has high chance of pregnancy. This is according to a study tracking 221 women planning for pregnancy, and their 996 menstrual cycles.

The calendar method tracks ovulation on day 14 after the beginning of a normal menstrual cycle (28 to 35 days). However, using this standard calculation to track the chances of getting pregnant isn’t completely reliable. The fertile window for ovulation occurs during a large range of days, from day 6 to 21. There were also variations for females that had the same menstrual cycle length.

The chance of conceiving for women usually peaks on the day right before their ovulation. The Human Reproduction Journal says that sperm can live in the female reproductive tract for five days or more.

Blood work and ultrasounds can detect ovulation but won’t track the whole five-day fertile window. Here’s what research based on several studies combined, says about the chance of conceiving relating to ovulation.

  • Day 5 Before Ovulation: 0.4-7% chance of conception
  • Day 4 Before Ovulation: 8-17%
  • Day 3 Before Ovulation: 8-23%
  • Day 2 Before Ovulation: 13-29%
  • Day 1 Before Ovulation: 21-34%
  • Day of Ovulation: 8-33%
  • Day 1 After Ovulation: 0.8-11%


Tracking the Length of Ovulation




The time of ovulation varies greatly between women. Therefore, making it difficult to track the optimal time to sync your intercourse schedule with your ovulation. There are various tools/methods to track ovulation, such as using basal body temperature and ovulation prediction kits (OPK).

Nonetheless, these tips are not fully reliable, or they only give users a heads up a mere 24 hours before ovulation. A Mira Fertility Tracker would be able to help tracking exactly when you are fertile and non-fertile.

Mira measures your actual fertility hormone concentrations and shows your unique hormone curve on the App. Unlike the OPK’s, Mira’s smart algorithm learns your cycle. You are unlikely to miss ovulation even your cycle varies.

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What Affects the Ovulation


Healthy diet



By the time a woman reaches age 16, she should have begun regular ovulation, resulting in recurrent periods. A woman’s cycle stays consistent until her late 30s to early 40s. After that, periods may become irregular, or less frequent. This stage is called perimenopause – when the body’s transition to menopause begins.

High Fibre Diet

Dietary fiber comes with many health benefits, like reducing inflammation, maintaining blood sugar and blood pressure levels. On the contrary, experts claim that fiber can lower estrogen levels. Low estrogen levels can make getting pregnant more difficult and prevent ovulation.

There was a study done to test the negative effects of a high fiber diet on ovulation. The sample included 250 women ranging from 18-44 years old. The results suggested that women consuming 22 grams or more of fiber per day may ovulate less frequently.

Under Eating

Functional hypothalamic amenorrhea (FHA) is a diagnosis for infertile patients that is linked to undereating. Undereating can affect estrogen levels and lower thyroid hormones. FHA is to blame for up to 35% of instances where otherwise healthy adult women no longer get their periods.


Final Note

For those trying to conceive, 7 days before ovulation till 24 hours after ovulation are your best chance in a menstrual cycle. Calendar method is only 80-87% effective in finding the fertile window.

On the other hand, there are many different strategies women can use to boost fertility. Having intercourse 3-4 days per week during your fertile window can increase the chances of pregnancy.

Furthermore, self-care is essential to maintaining a steady ovulation cycle. Finding ways to de-stress when feeling overwhelmed is helpful in maintaining a healthy reproductive hormone balance. In addition, giving your body the nutrients it needs, and keeping a low fiber diet is beneficial as well. If you’re interested in boosting your fertility naturally, this post is a great way to start.

Order Your Mira Today

Ready to easily, precisely, and automatically track your ovulation cycles? Let Mira take the guesswork out of getting pregnant, so you know exactly when to conceive.

Reserve Your Mira Today

Ready to easily, precisely, and automatically track your ovulation cycles? Let Mira take the guesswork out of getting pregnant, so you know exactly when to conceive.