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Lecture 13 - Pregnancy and child birth.pdf
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Other Hormones During Pregnancy

Estrogen and Progesterone inhibit release of GnRH, FSH, & LH

Prolactin levels increase during pregnancy

Relaxin relaxes pelvic ligaments in preparation for parturition and also inhibits contractions in the uterus

First two months comes from the corpus luteum in response to hCG

Later in pregnancy relaxin is secreted by the endometrium

Other Hormones During Pregnancy

Insulin release from the pancreas increases in response to a decreased sensitivity to insulin

Gestational diabetes

Aldosterone from adrenal glands promote sodium and water retention in the mother

Cortisol from adrenal glands promote increased body fat and increased appetite

Increased thyroid hormones T4 and T3 increase basal metabolic rate

increased heart rate which increases the rate of oxygen and nutrients to the fetus

Pregnancy

Usual gestation time is 280 days

First Trimester – Month 1 to 3

Second Trimester – Month 4 to 6

Third Trimester – Month 7 to delivery

First Trimester

Tiredness

Nausea

Vomiting

Morning sickness

Breast tenderness

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