This may be done with a medication, device, or by blocking a process of reproduction. This period involves rapid growth and development of the major organ systems and main external features. It can cause abnormal menstrual bleeding and can become precancerous. The endometrium becomes thicker as the menstrual cycle advances in preparation for a fertilized egg. If no fertilization occurs, the endometrium is shed with each menstrual flow.
Human estrogen is produced primarily in the ovaries in women.
ERT relieves post-menopausal symptoms, such as dryness of the vagina and hot flashes, and prevents osteoporosis. The fallopian tube transports eggs to the uterus and is where fertilization with sperm takes place. For the first 8 weeks the stage of growth is called an embryo. It appears firm, round, and gray-white. Multiple growths of this kind develop most often in the wall of the uterus.