Use our free online fertility calculator to determine your peak fertility dates for the coming year. This can be especially helpful for couples who need to time for "baby-making sex".

This calculator is based on the fact that

1. ovulation occurs 14 days before the next menstrual period is due; and that
   
   
2. fertility peaks on the day of ovulation, and for 4 days prior to this.

Just enter :

1. The first day of your last menstrual period ( the day the bleeding starts)
   
   
2. The length of your menstrual cycle ( number of days from the first day of your period to the first day of the next period)

Interested in learning more ? You can find out more about how your body works and how you can use the signals it gives you by tracking your ovulation .

If you live in India, we can also send you an SMS on your mobile free of cost to remind you of your fertile days.

Please register at http://infertilityphr.yoscare.in if you'd like to make use of this great new service , which is being offered for the first time in the world !