How are babies born?

When a man and a woman have sex, the erect penis of the male is inserted into the vagina of the female. The sperm cells of the male are ejaculated into the vagina of the female. If an egg cell has been released in the ovary at that time, it may get fertilized by the sperm and the woman may become pregnant. The baby develops in the woman’s uterus for about 40 weeks, till it is developed enough to be born. Usually, babies are born healthy, but sometimes they may be born with a disability.