Unformatted text preview: About midway through the menstruation cycle, ovulation occurs. The egg is released from the follicle into the fallopian tube. A surge of LH causes this to occur. Once the egg is released it has about 24 hours to be fertilized. After the follicle releases the egg it becomes a gland releasing the hormone progesterone. Progesterone inhibits new follicle formation, keeps blood lining of uterus in place, and inhibits uterine contractions. If no fertilization occurs the corpus leutem will break down and progesterone levels will drop. Without progesterone uterine cramps occurs and the blood lining of the uterus begins to break down. A new follicle will begin to form and the cycle will start again. If fertilization does occur, the corpus leutem will remain and progesterone levels will remain high for the entire gestation period. Chart of Uterine Lining:...
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This note was uploaded on 04/20/2008 for the course BIO bio101 taught by Professor Dest during the Spring '08 term at University of Delaware.
- Spring '08