Behind the scenes, hormones control the cycle of ovulation and menstruation inside the female body.
This automatic process is what allows women of childbearing age to release an egg each month.
An ovulation/menstruation cycle lasts typically around 28 days. Each woman’s cycle is different, and anything from 21 to 40 days cycle length is considered normal.4
Around half-way through the cycle, an egg is released, and the uterus lining thickens in preparation for fertilisation.
This is when your fertility is at its all-time peak for the month, and you have the highest chances of conceiving if you have sex the day you ovulate.
Sperm lives in the body for about a week, so you’re technically fertile any time week up to the point of ovulation, although the day of ovulation (and a day either side) is the time fertility is at its highest. If no sperm is present to fertilise the egg, this lining is shed at the end of the cycle in over a few days, and it begins again.
Getting familiar with your cycle will help you increase chances of pregnancy as you can ensure to have sexual intercourse the days leading up to, and the day of, ovulation.
Keep a diary of your cycle, from the end of your last period to the beginning of your next one. Your ovulation window will be somewhere in the middle.
Some smartphones feature a health tracking app which helps you log your cycle and can pinpoint the likely ovulation window based on the details you enter.