1980
DOI: 10.1530/jrf.0.0600389
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Regulation of oestrogen-induced LH release in male and female marmoset monkeys (Callithrix jacchus)

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Cited by 13 publications
(6 citation statements)
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References 23 publications
(28 reference statements)
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“…In the intact adult male, the majority of the animals demonstrated an initial decrease and then increase in LH levels after estradiol administration. The maximal levels of LH were relatively lower and achieved later (28–36 hr), compared to the castrated marmosets (Hodges and Hearn, 1978; Hodges, 1980). Nevertheless, the existence of a clear positive feedback response to estradiol injection in an intact normal male seems to be unique to the marmoset.…”
Section: Testicular Developmentmentioning
confidence: 82%
“…In the intact adult male, the majority of the animals demonstrated an initial decrease and then increase in LH levels after estradiol administration. The maximal levels of LH were relatively lower and achieved later (28–36 hr), compared to the castrated marmosets (Hodges and Hearn, 1978; Hodges, 1980). Nevertheless, the existence of a clear positive feedback response to estradiol injection in an intact normal male seems to be unique to the marmoset.…”
Section: Testicular Developmentmentioning
confidence: 82%
“…Differentiation is certainly present in rodents (Butcher et al, 1974 ; Kalra and Kalra, 1983 ); however, in primates, the sexual differentiation of the pituitary function related to gonadotropin secretion is different from that in rodents (Karsch et al, 1973 ). Luteinizing hormone induction due to positive feedback from estrogen is evident in female, but not male, rodents (Kalra, 1993 ); although, in primates, both sexes secrete luteinizing hormone in response to estrogen (Karsch et al, 1973 ; Hodges, 1980 ). Estrogen positive feedback is capable of inducing luteinizing hormone secretion even in castrated human males, suggesting that exposure of the human brain to androgen during the early perinatal period does not completely induce a sexually dimorphic mechanism for controlling gonadotropin secretion (Barbarino and De Marinis, 1980 ).…”
Section: Sexual Differentiation Of the Hypothalamus: Rodents And Primmentioning
confidence: 99%
“…In the second application, we evaluate the gonadotropin response to estrogen injection in male lion tamarins. In male common marmosets, an estrogen challenge yields significant elevations in plasma LH after an initial suppression [positive feedback, Hodges, 1980;Hodges & Hearn, 19783, while in other species only negative feedback (reduced gonadotropin concentrations) is noted after estrogen stimulation in intact males [Karsh et al, 1973;Westfahl et al, 19841. We wished to evaluate which pattern is expressed by male lion tamarins.…”
Section: Mone Negative Feedback Ovulation Detectionmentioning
confidence: 99%