London - Pregnancy

Ovulation calculator

Knowing the days you are most likely to be fertile can increase your chance of getting pregnant. The typical menstrual cycle is 28 days long, but each woman is different. There are about 6 days during each menstrual cycle when you can get pregnant. This is called your fertile window.

If you’re trying to fall pregnant, the timing of when you and your partner have intercourse is critical.

Ovulation Calculator will help you understand your 'fertile window' – or your window of opportunity to fall pregnant during a normal menstrual cycle. You should be having sex every couple of days during your fertile window.

For our Ovulation Calculator to be the most accurate and useful, you'll need to keep track of the dates of your recent menstrual periods.

Your cycle length is the number of days between the first day of bleeding of one period, and the first day of bleeding of the next. This can vary from 23 to 35 days, and 28 days is about average. If you have irregular menstrual cycles, calculating your ovulation date can be more difficult, but we suggest going by your shortest period date to ensure you don’t miss your ovulation date. Ovulation urine tests can give you some idea of your fertility window, or you might find further advice from your GP or fertility specialist useful.

How we calculate your fertile days

The Ovulation Calculator estimates when you'll ovulate by counting back 14 days from the day you expect your next period. (If your cycle is 28 days long, your next period should start 28 days from the first day of your last period.)

Your fertile window includes the day you ovulate and the five days before, but keep in mind that you're much more likely to get pregnant during the last three days of this time frame.

for your understanding Ovulation Calculator

Usual cycle length : 28 Days

First day of your last period : 01/01/2022

Your fertile windows would be : 6 February – 11 February, if you continue to have regular cycles.

Your fertile window after that will be: 6 March – 11 March

Please note: If the first day of your period or your cycle length changes, you will need to recalculate