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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