How is an embryo protected?

An embryo is protected within the mother's uterus by the amniotic sac, which contains amniotic fluid to cushion and support it. The uterus also provides a physical barrier and nourishment through the placenta, which facilitates the exchange of oxygen, nutrients, and waste products between the mother and the embryo. Hormones produced by the mother and the embryo help to maintain the pregnancy and support the embryo's growth and development.