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| -time since 1st day of last menstruation |
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| -formation and development of gametes |
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| sperm production occurs here |
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| type A sperm daughter cells |
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| type B sperm daughter cells |
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| -small non motile cells close to the lumen of the tubule |
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-spermatids lose excess cytoplasm and form a tail
-head-acrosome/nucleus
-body-mitochondria
-tail-flagellum |
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-begins in fetal period
-oogonia form oocytes (mitosis) |
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| oocytes become surrounded by a single layer of |
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| meiosis but stall in prophase I |
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| each month one oocyte is activated |
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-to resume meiosis I
-results in 2 haploid cells
-secondary oocyte and first polar body |
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| secondary oocyte finishes meiosis I, begins meiosis II but |
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| stalls in metaphase II and is released from ovary |
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| if a sperm reaches the oocyte |
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| it will complete meiosis II yielding ovum and second polar body |
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-primary to secondary oocyte
-follicular phase
-ovulation
-luteal phase |
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-primordial follicle becomes primary follicle
-squamous to cuboidal |
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-primary to secondary follicle (stratified)
-inner layers called granulosa cells |
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-secondary follicle to late secondary
-CT condenses around
-zona pellucida forms around
-fluid accumulates |
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-late secondary to vesicular follicle
-antrum forms and expands to isolate oocyte
-vesicular follicle bulges from surface of ovary
-primary oocyte completes meiosis I |
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-ovary wall raptures and expels secondary oocyte with its corona radiata
-driven by LH and FSH |
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-ruptured follicle collapses
-granulosa cells and CT form corpus luteum
-corpus luteum secretes progesterone and estrogen
-if no pregnanacy, it degenerates in 10 days
-if pregnant, placenta takes over in 3 months |
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-day 1-5
-ovarian hormones at lowest levels
-endometrial layers shed and menstrual flow occurs |
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-day 6-14
-estrogen dependent
-generation of new layers and progesterone receptors
-glands enlarge and spiral arteries increase in number |
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-day 15-28
-progesterone dependent
-further endometrium development
-glandular secretion of glycogen |
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