Implantation bleeding or spotting is a small amount of blood that is released from the uterus when the fertilized egg implants into the lining of the uterus.
Pregnancy usually begins with the fertilization of the egg by the sperm. There are three trimesters and each trimester brings different changes and challenges.
Pregnancy usually begins with the fertilization of the egg by the sperm. It implants in the lining of the uterus, where it begins to grow and develop.
The beginning of the menstrual cycle marks the onset of puberty. It is a series of changes which takes place regularly in females in preparation for pregnancy.