Dat Menstrual Cycle
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Follicular phase
Follicular phase
cessation of menst.cycle FSH from ant. pit. promotes dev. of follicel which grows and begins secreting estrogen.
cessation of menst.cycle FSH from ant. pit. promotes dev. of follicel which grows and begins secreting estrogen.
Ovulation
Ovulation
mature ovary follicle burst and releases ovum. Ovulation caused by surge in LH which is preceded by peak in estrogen.
mature ovary follicle burst and releases ovum. Ovulation caused by surge in LH which is preceded by peak in estrogen.
Luteal phase
Luteal phase
LH induces rptured follicle into corpeus luteum, which secreste estrogen and progest.
LH induces rptured follicle into corpeus luteum, which secreste estrogen and progest.
Menstruation
Menstruation
If ovum not fertilized then corp.leut. breaks down. results in drop in proges. and estrogen levels cause endometrium to slough off=menses.
If ovum not fertilized then corp.leut. breaks down. results in drop in proges. and estrogen levels cause endometrium to slough off=menses.
If fertilization occurs:
If fertilization occurs:
placenta produces hCG mainting corp.leut.,estrogen and progest. keeps at placneta
placenta produces hCG mainting corp.leut.,estrogen and progest. keeps at placneta
Follicular phase
cessation of menst.cycle FSH from ant. pit. promotes dev. of follicel which grows and begins secreting estrogen.
cessation of menst.cycle FSH from ant. pit. promotes dev. of follicel which grows and begins secreting estrogen.
Ovulation
Ovulation
mature ovary follicle burst and releases ovum. Ovulation caused by surge in LH which is preceded by peak in estrogen.
mature ovary follicle burst and releases ovum. Ovulation caused by surge in LH which is preceded by peak in estrogen.
Luteal phase
Luteal phase
LH induces rptured follicle into corpeus luteum, which secreste estrogen and progest.
LH induces rptured follicle into corpeus luteum, which secreste estrogen and progest.
Menstruation
Menstruation
If ovum not fertilized then corp.leut. breaks down. results in drop in proges. and estrogen levels cause endometrium to slough off=menses.
If ovum not fertilized then corp.leut. breaks down. results in drop in proges. and estrogen levels cause endometrium to slough off=menses.
If fertilization occurs:
If fertilization occurs:
placenta produces hCG mainting corp.leut.,estrogen and progest. keeps at placneta
placenta produces hCG mainting corp.leut.,estrogen and progest. keeps at placneta
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