1978 is a year in which science changed forever. On July 25, Louise Brown was born in the city of Bristol, England, and her parents, Jhon and Lesley, were fascinated with the arrival of their little girl.

What are the fertile days of a woman? This is a very common question from couples who are trying to get pregnant. The popular belief is that the day ovulation occurs is the day of greatest fertility and couples try to identify that day to have sex.