We are planning to have a baby now from the past 4 months. We have had intercourse on the right days, we both are healthy but still my wife could not concieve, she is 28 years old and myself is 35 years old now. Her periods are regular with a cycle of 28 days. but somtimes its like 2 days earlier or 3 days late. She had her period on the 18th of this month and will end on 22nd... please advice us what to be done & when are the perfect days for sex, so that she can get pregnant. Thank you very much Doctor.