Had my last menstruation last month 18th today makes it day 20 been regular with sex but still not pregnant, please what could be the cause??

Explanation : There are many causes that prevent pregnancy. If you a healthy young person without any history of STD or pelvic disease, just be patient, enjoy sex. If some problem before you need to see gynecologist. Give yourself some time like a few months.

Give it time...: On average, to many people's surprise, it takes an average of 6 months for a couple to conceive. It is not considered a concern unless a year goes by without pregnancy. If it has been a year see a doctor. There are many potential causes. About 40% of the time it is related to male fertility issues so a semen analysis is a good place to start an evaluation.

Pregnancy : May take time to occur even without problems. We may require a full history like the regularity of your periods, your weight or any other symptoms you may and also male factors. A fertility doctor may best if you have been trying for long