Hormonal regulation of oogenesis and the menstrual cycle

Hormonal regulation of oogenesis and the menstrual cycle -...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Hormonal regulation of oogenesis and the menstrual cycle The human female reproductive cycle is characterized by events in the ovary (ovarian  cycle) and the uterus (menstrual cycle). The purpose of these cycles is to produce an  egg and to prepare the uterus for the implantation of the egg, should it become  fertilized. The ovarian cycle consists of three phases:  1. The follicular phase describes the development of the follicle, the meiotic  stages of division leading to the formation of the secondary oocytes, and the  secretion of estrogen from the follicle. 2. Ovulation, occurring at midcycle, is the ejection of the egg from the ovary. 3. The luteal phase describes the secretion of estrogen and progesterone 
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: from the corps luteum (previously the follicle) after ovulation. The menstrual (uterine) cycle consists of three phases: 1. The proliferative phase describes the thickening of the endometrium of the uterus, replacing tissues that were lost during the previous menstrual cycle. 2. The secretory phase follows ovulation and describes further thickening and vascularization of the endometrium in preparation for the implantation of a fertilized egg. 3. The menstrual phase (menstruation, menses) describes the shedding of the endometrium when implantation does not occur....
View Full Document

Ask a homework question - tutors are online