At the 6th week of pregnancy in the organism of the expectant mother hormone progesterone is continuing its active work: it strengthens the mucous membranes of the uterus, which will ensure sufficient blood supply to the fetus.

Because of the strengthening of the blood supply breasts of a pregnant woman can grow and become more sensitive, areola may darken.

In addition to traditional toxicity, beginning of pregnancy for some expectant mothers is accompanied by weakness, drowsiness and fatigue, while other experience conditions of peace, and the third feel increased nervous irritability, tearfulness and irritability.

These changes are associated with hormonal reconstruction that occurs in the female body. Once the female body adapts to the new role, and most often it occurs in 10-14 weeks of pregnancy, all of the discomfort is usually terminated.