How does oestrogen play an important role in the development of the fetus?
Answer
By promoting maternal blood flow to the uterus and placenta it ensures that the fetus is supplied with nutrients and oxygen for its development, and that waste products from the fetus are removed in the mother’s blood. (You learned about this in Study Session 5.)
End of answer
A pregnant woman’s progesterone levels are also very high. Among other effects, high levels of progesterone cause some internal structures to increase in size, including the uterus, enabling it to accommodate a full-term baby. It has other effects on the blood vessels and joints, which we will discuss later in this study session.
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