Explain how to know when i'm infertile?

Ovulation prediction: The most simple way is to use an ovulation prediction kit. You can buy them without a prescription in a pharmacy. You count 12 days from the start of your period and start testing your urine every day until it turns positive. There are also apps for your phone that will help you calculate your fertile window based on your menstrual history. Not a great way to prevent pregnancy. Best wishes!

Infertility: 1 year of unprotected intercourse is the definition of infertiity. At that point further invesigation needs to be done to determine if it is a male or female factor

Infertility: Defined as failure to conceive after 12 months of regular unprotected intercourse. If this is your situation, begin with an evaluation by an OB/Gyn physician. Follow their suggestions for further evaluation. Thanks for trusting HealthTap!

You ovulate: 14 days before you start your period, If you have a 26 day cycle you will ovulate on day 12 with day 1 being the first day of your period. Or you can buy an ovulation test kit over the counter.