Ovulation calculator

How to calculate ovulation?

You can roughly calculate when your next ovulation will occur based on the first day of your last period and the total length of your menstrual cycle. For most women, ovulation usually occurs 14 days before their next period.
A woman's cycle is controlled by hormones and usually lasts 25 to 32 days.
You can get pregnant about six days into each cycle, five days before your ovulation because sperm can survive so long inside the womb waiting for the egg to come and the day you ovulate.

Please use our ovulation calendar above to see your fertile days.

When is the best chance of conception?

To get pregnant, you should have unprotected sex in the days before and on your ovulation day as the egg is only fertile for up to 24 hours.
When the egg detaches, it is caught by the fallopian tube and travels down to the uterus. During this migration it can be fertilised by sperm. The egg is fertile for half a day to a day. If the egg is not fertilised, it lives for about a day.

If you are unsure exactly when you ovulate, it may be wise to have sex every two to three days throughout your menstrual cycle instead of trying to pinpoint the exact ovulation day and you maximise the chances of you having sex precisely on the ovulation day.
You don't need to have sex every day as sperm can survive in the womb for several days.

Signs that you are ovulating

Ovulation and menstruation are linked, but you can have your period without ovulating in the weeks before. For an egg to be released, there must be high enough levels of the hormone oestrogen in the blood. Ovulation is often less frequent when a woman is in her 40s.

Ovulation is felt and noticed through signs and symptoms such as pain and discomfort in the lower abdomen, they may also have a translucent discharge and the woman may experience a slight change in body temperature. Some women say they can feel their ovulation. Others feel no signs at all that it is time to ovulate.