Pregnancy begins when the fertilized egg implants in the uterine lining. Here's what to know about implantation and how long ...

It stops ovulation, so you don’t release an egg. It stops fertilization, so a sperm doesn’t reach and fertilize an egg. It stops implantation, so a fertilized egg doesn’t stick to the lining ...

If fertilization has occurred ... The pill uses the body's negative feedback system to prevent ovulation and implantation of an embryo, in the same way the hormones provided by the placenta ...

Live imaging of mammalian pre-implantation events Mammalian ovulation, fertilization, estrous cycle and pre-implantation pregnancy are very fundamental processes with long history of research studies ...