What is implantation during pregnancy and when does it occur? Learn the symptoms of implantation here, including implantation-related bleeding and cramping. Implantation Symptoms What is fertilization? When the sperm enters the vagina, they have to travel a long distance before being able to fertilize the egg. After this, sperms undergo capacitation for being able to withstand the harsh conditions of the vagina. Later on, only a small fraction of sperms remain from the 300 million that first came. Fertilization is the fusion of a healthy sperm head into an ovum. It leads to the mixing of genes of mother and father. The egg is now a zygote ... If you are familiar with the common signs of implantation and how the process of implantation occurs, you will understand your own fertility cycle.
