Anatomical and Physiology in Pregnancy.docx

**Anatomical & Physiological changes in Pregnancy** Pregnancy hormones, such as estrogen and **Major Problems during Pregnancy** **Hormones in Pregnancy** **How is HCG secreted, and what is its action?** It is secreted from the developing embryo and later the placenta if fertilization and its m...

**Anatomical & Physiological changes in Pregnancy** Pregnancy hormones, such as estrogen and **Major Problems during Pregnancy** **Hormones in Pregnancy** **How is HCG secreted, and what is its action?** It is secreted from the developing embryo and later the placenta if fertilization and its main actions is to prevent the disintegration of the corpus luteum. It maintains progesterone production and supports the uterus in preparation for fertilization. **How is progesterone secreted, and what is its action?** It is secreted from the corpus luteum in the ovary after ovulation or by the placenta during pregnancy and the main action of progesterone is to prepare the uterine lining for a fertilized egg, favouring and supporting pregnancy. **How is oestrogen secreted, and what is its action?** Is primarily secreted and released by the developing follicles in the ovaries and its action plays a crucial role in the female reproductive system. It is produced and released by the developing follicles in the ovaries. Estrogen stimulates the growth of the egg within the follicle and also stimulates the production and release of LH (Luteinizing Hormone) from the anterior pituitary gland. **How is oxytocin secreted, and what is its action?** It is primarily secreted from the hypothalamus and released by the posterior pituitary gland and its main action is to stimulate uterine contractions during labour. **Embryonic & Fetal Development** **Describe implantation?** The blastocyst consists of two cell masses: a. The inner cell mass or embryoblast this eventually forms the embryo. The outer cell mass or trophoblast this forms attachment to the uterus and gives rise to the fetal placenta. -- --