Ovulation Calculator

Understanding your ovulation cycle

Ovulation is the release of a mature egg from your ovary, typically occurring once per menstrual cycle. Understanding your ovulation cycle is key to planning or preventing pregnancy. The fertile window — when conception is most likely — spans approximately 6 days each cycle.

Once you conceive, the real journey begins. Use our due date calculator to estimate your baby's arrival, then explore our pregnancy week by week guide to track development.

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Signs of ovulation to watch for

• ●Change in cervical mucus — becomes clear, slippery, and egg-white-like during your fertile window
• ●Mild cramping — some women feel a slight twinge on one side of the lower abdomen (mittelschmerz)
• ●Basal body temperature rise — your temperature increases 0.5-1°F after ovulation and stays elevated
• ●Increased sex drive — natural libido increase during the fertile window is common
• ●Breast tenderness — hormonal changes can make breasts feel sore or heavy