1. The development of fetus.

2. Changes occurring in women during pregnancy.

3. Hygiene pregnant.

4.Complications during pregnancy.

Pregnancy is a normal physiological process, during which in a woman's body undergoes substantial changes. This requires future mother strictly under medical supervision to observe hygienic rules conducive to the maintenance of health and normal development of the fetus. The mother, in the broadest sense is the environment for future child and favorable conditions of the mother, of course, create opportunities for its growth and normal development. No wonder even in ancient times, said: "In healthy female body - the future of the people. " In all the female body is designed for reproduction. Sex bodies perform the function of maternity, breast - function catering unborn baby.

How pregnancy occurs? When sexuality in the woman's vagina gets semen,produced male sex glands. She contains a large number of male germ cells - sperm hundreds of millions. These cells due to their structure have mobility. Each sperm has a head,neck and tail. The head bears core of genetic information, the cervix provides energy for movement, the tail directs the movement forward. Through cervical canal sperm penetrates uterus, and then to the fallopian tubes, where there is a meeting with egg, the released from the ovary. Several sperm surround egg, then the break shells of their heads, and the contents poured out, catching at the same enzyme is used to soften dense shell eggs, providing access to a single sperm into eggs, while the core of their merge.This process is called conception or fertilization.

Fertilization usually occurs in the outer third of the fallopian tube. Then egg continues to move to the uterus, where a few days mounted on its wall.