It steps up blood circulation and regulates the production of other key hormones, as well as promoting breast engorgement in early pregnancy and regulating bone density. It is helpful in preventing miscarriage, and acts as a catalyst for chemical changes for growth, development and energy in the baby. Function: preparing uterine lining for the implantation of the embryo.After this, the placenta and fetal adrenal gland produce it until term. Pregnancy stage: oestrogen is produced from pre-pregnancy until about 10-12 weeks from the follicle area in the ovary, where the egg is released from.
Side effects: headache, irritability, restlessness, fatigue, insomnia, nausea, vomiting (can be excessive and abnormal) and fluid retention.
In this article, Consultant Gynaecologist Pradnya Pisal provides information on each of these hormones: There are 6 key pregnancy hormones, which contribute to the emotional and physiological changes women tend to experience when pregnant.