Which statement about hormonal influences during pregnancy is true?

Prepare for the Davis Advantage Maternal-Newborn Test with engaging flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding. Equip yourself for exam success!

During pregnancy, progesterone plays a crucial role in maintaining the uterine lining, which is essential for creating a stable environment for the developing fetus. This hormone is produced initially by the corpus luteum and later by the placenta. Progesterone helps to thicken the endometrium, making it more receptive to implantation of the fertilized egg and essential for sustaining the pregnancy through the first trimester and beyond.

The increase in progesterone levels helps to relax smooth muscles, preventing uterine contractions that could lead to premature labor. Additionally, it contributes to the overall pregnancy response, including altering the maternal immune system to prevent the rejection of the fetal tissue. Thus, the statement emphasizing the role of progesterone in maintaining the uterine lining is correct, highlighting its critical function during pregnancy.

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