The surge of gonadotropin in estrus cycle of rat occurs during
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Cheryl A. Frye1, in Vitamins & Hormones, 2014
21.3
Estrous cycle/sperm motility
Estrous cycle duration in females and sperm motility in males can be used as a marker of sexual maturity/gonadotropin responsiveness (see Table 3.2). Female rats typically cycle every 4–5 days (Asdell, 1964). Both estrous cycle length and sperm motility are altered by exposure to EDCs. Estrous cycle duration of adult females is lengthened (Sager & Girard, 1994) and sperm motility of adult males is decreased (Hsu, Holsen, & Hopke, 2003) with exposure to PCBs. Thus, EDCs can alter sex differences in sexual maturation.
21.3
Estrous cycle/sperm motility
Estrous cycle duration in females and sperm motility in males can be used as a marker of sexual maturity/gonadotropin responsiveness (see Table 3.2). Female rats typically cycle every 4–5 days (Asdell, 1964). Both estrous cycle length and sperm motility are altered by exposure to EDCs. Estrous cycle duration of adult females is lengthened (Sager & Girard, 1994) and sperm motility of adult males is decreased (Hsu, Holsen, & Hopke, 2003) with exposure to PCBs. Thus, EDCs can alter sex differences in sexual maturation.
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In female rats the estrus cycle occurs in every 4 to 5 days. It can be altered by the exposure to EDCs. With the exposure to PCBs, the duration of estrus cycle of adult female is increased.
Explanation:
The estrus cycle is the cyclical pattern of activity if ovary. It allows female to undergo in the period of reproductive receptivity to non- receptivity. It allows females to establish the pregnancy after mating.
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