How Many Days a Month Is a Woman Fertile?

How Many Days a Month Is a Woman Fertile?

Figuring It Out

When a woman is trying to conceive, it is very important for her to know what days in her cycle that she is most fertile. There are only a few days during the month that a woman can technically get pregnant, so if you are trying to get pregnant, you need to figure these days out.  Claim Your 20 Free Pregnancy Tests – Click Here

Having sex during your fertile time is the only way to get pregnant, so it is very important info to figure out. On average, a woman’s fertile time lasts only about five to six days, so you have to act fast!

The Basics

Most women have a 28 day cycle, although some women have a longer cycle or a shorter cycle. Based on a 28 day cycle, a woman will typically ovulate around day 14, or halfway through the cycle. Women with a longer cycle, say 35 days, will get pregnant around day 21.

Once a woman knows when she ovulates, it’s easy to figure out her fertile days. Basically, a woman is fertile for one to two days, possibly three if she is lucky, before she ovulates, the day of ovulation, and one to two, possibly three days after she ovulates.


For most women, with a 28 day cycle, they will be fertile on days 11-17. Her most fertile days will be days 13, 14 and 15. A woman with a 35 day cycle will be fertile on days 18-24, with the most fertile days being days 20, 21, and 22.

Since sperm can live up to 48 hours inside the body (72 hours if they are super mega swimmers!), a woman could technically have sex a couple of days before ovulation and still get pregnant. If the egg does not get fertilized, a woman will start her period right around 14 days after she ovulates. So, you can figure as a general rule, your period, then wait two weeks, then you’re in your fertile time, then wait two weeks, then your period again.

Getting It Right

There are many ways for a woman to track and chart her ovulation to know for sure when she is ovulating. There are over the counter ovulation predictor kits that are similar to over the counter pregnancy tests that you can take each day to determine when you are ovulating. You can also keep a log of your temperature each day using a special basal body thermometer, and you can wait for the spike in your temperature to know when you are ovulating.

Also, tracking and keeping an eye on your cervical mucus can help you to figure out when you are ovulating (It will look like egg whites when you are ovulating). There are several other ways to keep track of ovulation, but these are the most popular ones.

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Alyssia Granger
Alyssia Granger | ConceiveEasy
Alyssia is mom to 2 giggley twin girls, Sophia and Emma, and son Hunter. She's a Southern girl, passionate about photography, travel and her husband Josh.