What is Luteal Phase?

The Luteal Phase is the time period beginning with the day after ovulation and running through the remainder of your menstrual cycle (ends the day before your next period). Typically, the duration of the luteal phase phase lasts between 10 and 16 days - and is generally consistent from cycle to cycle, averaging for most women at 14 days.

The luteal phase begins the day following ovulation. It lasts through the remainder of the menstrual cycle. In the Trying to Conceive (TTC) Community, the luteal phase is also referred to as "DPO" - or days past ovulation. At the onset of the luteal phase, women's body temperature increases (Basal Body Temperature) in order to provide a fertile environment for the ovum.

Most womens have a luteal phase that lasts 10-16 days - averaging at 14 days.

Pregnancy Due Date Calculator

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Our handy calculator will help predict your most likely due date.

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Ovulation Calculator

This calculator will give you the approximate dates when you are fertile. It is based on a regular menstrual cycle.

When was the first day of your last menstrual period?

Number of days in your menstrual cycle:

Here are your results:

Your ovulation date (mm/dd/yyyy) is:

Your fertile days are:

This calculator predicts ovulation dates based on the date of your last period and the length of your menstrual cycle. It provides approximate dates only. Having intercourse during the few days before ovulation will give you the best chance of becoming pregnant. Since sperm can survive for several days, keep in mind that these are not the only days to become pregnant.

Remember: If your periods are irregular, this calculator is not a good way to predict your ovulation dates. Speak to your doctor about other ways to help you identify when you can conceive.

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