Explain in brief about various physiological changes which takes place during pregnancy.

Pregnancy is a transformative period marked by numerous physiological changes that support the growth and development of the fetus while preparing the mother's body for childbirth and breastfeeding. Some key physiological changes during pregnancy include:

1. Hormonal Changes: Hormones play a crucial role in pregnancy. Human chorionic gonadotropin (hCG) is responsible for maintaining the corpus luteum, which produces progesterone to sustain the uterine lining. Progesterone helps prevent uterine contractions and supports early pregnancy. Estrogen levels increase, contributing to uterine and breast tissue growth.

2. Cardiovascular Changes: The heart pumps more blood per minute to meet the increased _______ __________ _________ ________ _______.
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