Peak Fertility

Definition - What does Peak Fertility mean?

Peak fertility is the period of time in a woman's menstrual cycle when she is considered the most fertile. This term usually refers to the specific day in a woman's cycle when ovulation occurs and she is the most likely to get pregnant. If a woman is trying to get pregnant, tracking her cycle to determine when she is most fertile can increase her chances of conceiving.

Peak fertility is also called the peak day.

FertilitySmarts explains Peak Fertility

There are about 6 days in a woman's cycle when she can get pregnant. These are the days up to and including the day of ovulation.

Hormone changes in the days leading up to ovulation prepare the woman's body for a potential pregnancy. Estrogen causes the uterine lining to thicken and a surge in luteinizing hormone (LH) causes a mature egg to be released from the ovary. The release of the mature egg is known as ovulation and usually occurs 12-14 days prior to the woman's next menstrual period.

Once the egg has been released, it can only be fertilized within the next 24 hours. This period of time is known as peak fertility or the peak day. If the egg is not fertilized in this time, the body will shed the uterine lining and the egg during the woman's menstrual period.

Although the egg is only able to be fertilized in the 24 hour period of time after it has been ovulated, a woman can also become pregnant if she has intercourse in the days leading up to ovulation. This is because sperm can survive in a woman's body for up to 5 days. Therefore, if she were to have sex before her egg was released, the sperm could still be present in her body at the time of ovulation.

A woman can track her cycle to determine when peak fertility will occur so that she can determine when she is most likely to become pregnant.

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