Where firtilisation happens?

Answer 1

Fertilisation normally occurs high up in the Fallopian tube. Once fertilisation has taken place development of a new individual begins immediately but it takes about 6 days before the growing structure reaches the uterus and becomes embedded in the lining of the uterus where it is receives nourishment from the mother's blood. This embedding is known as implantation. After implantation the developing embryo releases a chemical into the mother's blood preventing menstruation and so failure to menstruate is often the first sign of pregnancy.