During a womens life span she will ovulate about 400 times all together. In her fifty's the ova cease to produce and ovulation stops. Ovulation itself takes place in the course of one or more minutes. The ovary grows. The Fallopian Tube sucks in the ovum.
Fertilization takes place.
The Blastocyst starts its journey down the fallopian tube. The blastocyst enters the uterus and sheads its outer membrane. The ovum or blastocyst implants itself into the uterus. Three weeks later the blastocyst becomes an embryo.