Birth reduction.

Increased CBV associated with the growth of the placenta, the formation of a new range placental circulation, with the increase of mass with breast cancer veins genitals and lower extremities. By 26 weeks is reduce blood viscosity, a change in its rheological properties that reaches maximum of 28 weeks.

By the end of pregnancy, childbirth and the viscosity of normal.

Blood pressure.

Systolic and diastolic blood pressure umenshaeyutsya.

Systolic pressure, to a lesser extent, mainly in the second trimester of 5-15 mm Hg. The lowest pressure at 28 weeks. Then gradually increases to a level that was before the pregnancy, but not more than 5-15 mm Hg.

If a higher level, it speaks of gestosis or functional changes in a woman's body.

Individual blood pressure is defined by:

· Level and an increase in IOC

· Increase BCC

· Periferichskogo decrease in total vascular resistance

· Rheological parameters

Reducing the total peripheral resistance associated with the formation placental disc and vasorelaxant action of hormones, which allocated during pregnancy (progesterone).