Saturday, May 29, 2010

Ovarian and Uterine Cycles





Uterine cylce: lining of ueterus builds and exits the body through the vagina(menstruation)








Ovarian Cycle: mature egg travels to the uterus








LH: aka luteinizing hormone released in the pituitary gland and causes ovulation (when follicle release and egg)








Progesterone: released by the ovaries when an egg is released from an ovary. Prepares unterine lining or endomitrium for the occurance of a fertilized egg.








FSH: aka folicle stimulating hormone from pituitary gland controls sexual maturation and reproductive system








Estrogen: Responsible for the developement of secondary sex characteristics in women. Released in larger amounts when folicles grow and then helps to thicken the uterine lining. when there is more estrogen the pituitary gland releases LH and FSH








GnRH: aka gonadotropin releasing hormone released by the hypothalamus causes FSH and LH to be released








hCG: aka human chronic hormone released when egg has been fertilized








menstruation and pregnancy: hormone levels high during pregnancy








negative feedback loop: decrease of hormones in the body








positive feedback loop: increase in hormones because the egg is released into the uterus and more hormones are needed to aid in the developement of the fetus.












first trimester: zygote divides into millions and millions of cells then officially becomes a fetus and begins to develop internal organs








second trimester: fetus develops lungs and brains








third trimester: fetus reaches full maturity and is able to function outside of the uterus

1 comment:

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