In: Anatomy and Physiology
Ovarian and uterine cycle are tightly coordinated. hormone secreted by ovary at different phase of ovarian cycle trigger changes in uterine lining. e.g at begining of cycles, the level of estrogen and progesterone are too low to maintain uterine lining and menses begins.
Ovarian cycle can be divided into three phases.
1. Follicular phase, ovulation and luteal phase by releasing of follicle stimulating hormone and Lutenizing hormone.
The ovarian cycle describes the development and release of immature eggs (oocytes) in the ovary and changes in follicles.
Uterine cycle describes the preparation of inner lining of uterus for implantation by a fertilized egg and shedding of lining when implantation has failed.
folliculogenesis is divided into two major periods. preantral ( ganadotropins independent) and antral (FSH dependent). In preantral period a primordial follicle develops to primary and tertiary stage at which time cavitation formation begins. Thus, these are the cycles those are responsible to maintain and regulate the reproductive activities in a female.