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  • Title: Effects of neonatal medroxyprogesterone acetate on postnatal sexual differentiation of female rats.
    Author: Birke LI, Holzhausen C, Murphy S, Sadler D.
    Journal: J Reprod Fertil; 1984 May; 71(1):309-14. PubMed ID: 6233419.
    Abstract:
    Medroxyprogesterone acetate (MPA), 5 micrograms/g body wt, was given to lactating female rats 1 day after parturition. Group 1 females suckled 10-12 young, with equal numbers of males and females, while Group 2 females each suckled 10 female young. The young were weaned at 21 days of age. Exposure to MPA advanced the day of vaginal opening by 1 day, and increased anogenital distance in Group 2 young. At autopsy between 80 and 100 days of age, the clitoris of Group 2 females was significantly greater than in controls, and ovarian and adrenal weights were reduced.
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