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- W1972685457 abstract "Testosterone (T) treatment during early-midgestation (30-90 d; term is 147 d) leads to reproductive cycle defects. Daily ultrasonography in prenatal T-treated female sheep during the first two breeding seasons revealed an increase in the number of large follicles and follicular persistence. The objective of this study was to determine whether follicular persistence in prenatal T-treated females was programmed by the androgenic actions of T. Pregnant Suffolk ewes were injected with 100 mg (im; twice weekly) of T propionate or dihydrotestosterone (DHT, a nonaromatizable androgen) in cottonseed oil from d 30 to d 90 of gestation. Prior to daily transrectal ovarian ultrasonography, estrus was synchronized with two injections of 20 mg of prostaglandin F2alpha (PGF2alpha) given 11 d apart in two consecutive years. In yr 1 ultrasonography began 14 d after PGF2alpha, during the presumptive luteal phase, and continued until subsequent ovulation and corpora lutea were detected (10-13 d). In yr 2, ultrasonography began 2 d before the last PGF2alpha injection and concluded 25 d after the last PGF2alpha injection. Daily changes in appearance and disappearance of ovarian follicles and follicular sizes were assessed. Prenatal DHT, but not prenatal T, treatment increased the total number of follicles by increasing the number of small follicles. Prenatal T, but not DHT, treatment increased (P<0.05) the number of large follicles with the majority of prenatal T-treated females manifesting follicular persistence. The data indicate that occurrence of large-sized follicles and follicular persistence in prenatal T-treated females are not programmed by androgenic actions but likely are programmed by estrogenic actions stemming from aromatization of T to estradiol." @default.
- W1972685457 created "2016-06-24" @default.
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- W1972685457 date "2007-07-01" @default.
- W1972685457 modified "2023-10-05" @default.
- W1972685457 title "Developmental Programming: Follicular Persistence in Prenatal Testosterone-Treated Sheep Is Not Programmed by Androgenic Actions of Testosterone" @default.
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- W1972685457 doi "https://doi.org/10.1210/en.2007-0339" @default.
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