Ovulatory Facts

Below you will find a brief explanation of the ovulatory cycle. This explanation includes the organs and hormones which are involved in your cycle of ovulation.

 

Gonadotropin-releasing hormone (GnRH) is released by the HYPOTHALAMUS which is found at the base of the brain. GnRH is necessary to begin the ovulatory cycle.

 

The GnRH is carried to the PITUITARY. There, it prompts the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Both LH and FSH assist the development of the ovarian follicle, which holds the oocyte (egg).

 

FSH works on the OVARY to maintain growth and development of the follocle. Inside the follicle, FSH stimulates the production of estrogen, which causes a mid-cycle LH surge that promotes ovulation. At this time, the follicle bursts and the oocyte is released.

 

The part of the follicle that remains becomes the corpus luteum. The corpus luteum secretes progesterone which helps prepare theENDOMETRIUM for the implanting of the fertilized ovum (egg).

 

The FALLOPIAN TUBES are situated on the upper part of the uterus. The oocyte is picked by these tubes after its release from the ovary. Once fertilization has taken place the tube transports the fertilized egg into the uterus.

The fertilized ovum stays in the UTERUS and continues to develop throughout the woman's pregnancy until birth, when the fetus is delivered through the cervix, which is dilated, and out through the vagina.The CERVIX is the neck of the uterus. It is through the cervix that the fetus passes at the time of birth.