What is the primary function of the uterus during pregnancy?

The primary function of the uterus during pregnancy is to house the fetus as it develops throughout the gestation period, which typically lasts around 40 weeks. The uterus provides a safe and nurturing environment where the fetus can grow, and it is equipped to accommodate the significant changes that occur during this time, including the expansion to accommodate the growing baby.

This role is crucial not only for physical support but also for the overall development of the fetus. Within the uterus, the fetus is surrounded by amniotic fluid, which cushions and protects it from physical impacts. The uterine lining, or endometrium, becomes enriched with blood vessels to support the placenta, which in turn facilitates the transfer of nutrients and oxygen from the mother to the fetus.

While the other options relate to important aspects associated with pregnancy and fetal health, they do not capture the primary function of the uterus itself. For instance, while the uterus does provide some protection, it is not its primary role, nor does it directly supply nutrients or oxygen. Instead, these functions are primarily managed through the placenta and umbilical cord. The process of dilating and expelling the baby occurs during labor and delivery, which is also not reflective of the uterus's primary function during the majority of the