Ovulation Calculator

If you're trying to get pregnant, knowing when you're most fertile can help you achieve your goal. Ovulation occurs when an egg is dropped from the ovary, placing it in the ideal location (the fallopian tubes) for fertilization. This tools provides you with a window of five to six days of optimum fertility (your ovulation date, the three to four days preceding it and one day following it).

When was the first day of your last menstrual period?

Enter the Number of Days in Menstrual Cycle:


Your Ovulation Period:

Calculating your ovulation date can be a good first step in attempting to become pregnant. However, you may want to combine this with an ovulation predictor kit and temperature tracking. Your OB/GYN can give you advice tailored to your personal medical situation.

Find a San Diego OBGYN
To find a Sharp-affiliated doctor, search for a San Diego OBGYN or call 1-800-82-SHARP (1-800-827-4277), Monday through Friday, 8 am to 6 pm.

For More OBGYN, Pregnancy and Childbirth Information
To learn more about maternity care at Sharp, go to Pregnancy and Childbirth.

Because every patient's symptoms and medical history are unique, Sharp.com cannot offer personalized diagnosis and treatment advice. Please consult your physician for further information.