The third obstetric week of pregnancy is the first in life of future child. The embryo is not similar to the person yet, it is possible to consider it only in a microscope therefore will help to define pregnancy existence hardly even the device ultrasonography.
After merge of an ovum and a spermatozoon there is a formation of a zygote from which billions of cages of a fruit will develop. It begins to share and move on uterine tubes to a uterus.
For the third day of conception, fetal egg consists of 16 cages, and in 2 days – from 250. In 6-8 days there is a prorashchivaniye of blood vessels of fetal egg in a mucous membrane of a uterus which will provide with food of future kid.
Some women feel implantation as pricking in a uterus. Besides at this moment it is possible to notice on underwear small bloody allocations – implantation bleeding. On the 3rd week also other symptoms of pregnancy appear: fatigue, swelling of a breast, nausea, the speeded-up urination. In the first days after pregnancy approach the organism develops an early factor of pregnancy of EPF which allows to avoid an attack of the immune system of the woman on the foreign matter having other structure of genes. However implantation can not take place because of hormonal violations or harmful effects on mother's organism. In that case in a week the periods will be started over again. On the third week of pregnancy it is not necessary to do X-ray, to take strong medications, it is necessary to refuse addictions, to eat properly and to have a rest more. Last weekNext week