All adaptive responses yavlyayutya unconditioned reflexes. Growing fruit -- irritant receptor apparatus of the uterus.

Occurs:

· Decrease the excitability of the cortex

· Activity of the subcortex, the reticular formation of brain increases towards the end of pregnancy and childbirth, which prepares the woman to leave.

 In the early stages of pregnancy there are changes of the autonomic nervous system: the propensity to vagotonia - this state determines clinical symptoms: salivation, nausea, change in taste and smell.

Endocrine system.

Developed corpus luteum, placenta. There have changes in the endocrine system the woman, who focused on the normal development of the fetus functional maintenance of the female organism and preparation for childbirth.

Increased mass · expense of the anterior lobe of the pituitary (2-3 times) -- luteinizing hormone, lyuteotrpony hormone, TSH, ACTH, growth hormone. ACTH -- increased activity of the adrenal glands.

· Thyroid gland in the first month of being hyperplasia increases, improving function and by the end of pregnancy - reduction function.

Contents belkovosvyazannogo iodine does not change

· Parathyroid gland. The need for calcium increases. Violation calcium metabolism leads to spasms in the calf.

 In korkokom layer increases the number of adrenal steroid hormones (mineralocorticoids, glucocorticoids): gipokortitsizm - pigmented spots on the face, vokurg nipples on the white line belly band pregnancy (stria gravidarum) - after pregnancy does not disappear, becoming paler.

· Cortisol concentration increased 10 times from 8 weeks and 20 times to end of pregnancy.