Calculating ovulation

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This is an article from our “Doctor’s Corner” series, brought to you by Samitivej Hospital. Make sure to read the entire series!

Calculating ovulation

When calculating your menstruation cycle, you must count from the first day of your period until the last day before your next period begins. Women with regular menstrual cycle are able to calculate their ovulation date by noting down the first day of their period and then counting back 14 days. This date would be the ovulation date during that monthly cycle. In other words, the egg is released 14 days before menstruation begins.

For instance, in a 28-day menstrual cycle, ovulation is on the 14th day of that cycle. In a 30-day menstrual cycle, ovulation is on the 16th day of that cycle. Those with irregular menstrual cycles often have ovulation problems and should speak with their medical professional for more information.

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