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Revista Veterinaria Zacatecas 2006 - Universidad Autónoma de ...

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M C Romo-Villa et al<br />

feedback actions of estradiol but not<br />

affect timing of puberty in female sheep.<br />

Biol Reprod 2002; 66: 924-933.<br />

21. Foster DL. Puberty in the sheep. In:<br />

Knobil E, Neill JD. The Physiology of<br />

Reproduction, second ed. New York:<br />

Raven Press; 1994: 411-451.<br />

22. Dziuk P. Reproduction in the pig. In:<br />

Cupps PT. Reproduction in Domestic<br />

Animals. Fourth ed. San Diego:<br />

Aca<strong>de</strong>mic Press 1991: 471-490.<br />

23. West C, Foster DL, Evans NP, Robinson<br />

J, Padmanabhan V. Intra-follicular<br />

activin availability is altered in<br />

prenatally-androgenized lambs. Mol Cell<br />

Endocrinol 2001; 185: 51-59.<br />

24. Gore-Langton RE, Armstrong DT.<br />

Follicular steroidogenesis and its control.<br />

In: Knobil E, Neill JD. The Physiology<br />

of Reproduction, second ed. New York:<br />

Raven Press; 1994: 571-627.<br />

25. Elsaesser F, Ellendroff F, Pomerantz DK,<br />

Parvizi N, Smidt D. Plasma levels of<br />

luteinizing hormone, progesterone,<br />

testosterone and 5 -dihydro-testosterone<br />

in male and female pigs during sexual<br />

maturation. J Endocriol 1976; 68: 347-<br />

348.<br />

26. Parvizi N, Elsaesser F, Smidt D,<br />

Ellendorff F. Effects of intracerebral<br />

implantations, microinjection, and<br />

peripheral application of sexual steroids<br />

on plasma luteinizing hormone levels in<br />

the male miniature pigs. Endocrinology<br />

1977; 101: 1078-1087.<br />

27. An<strong>de</strong>rson LL, Fe<strong>de</strong>r J, Bohnker CR.<br />

Effect of growth hormone on growth in<br />

immature hypophysectomized pigs. J<br />

Endocrinol 1976; 68: 345-346.<br />

28. Morant M, Locatelli A, Torqui M,<br />

Chevalier M, Chambonm, Dufaure JP.<br />

Effects <strong>de</strong> l’hypophysectomie puis <strong>de</strong><br />

l’administration <strong>de</strong> la gonadotropine<br />

HCG sur le taux <strong>de</strong> testostérone et sur la<br />

structure <strong>de</strong> l’epididyme et <strong>de</strong>s glan<strong>de</strong>s<br />

accessories chez le verrat. Reprod Nutr<br />

Dev 1980; 20: 61-69.<br />

ABSTRACT<br />

Romo-Villa MC, Escobar-Medina FJ, <strong>de</strong> la Colina-Flores F, Zorrilla-<strong>de</strong> la Torre E. Effect of prenatal<br />

androgenization in swine on reproductive behavior. The effect of application of 1 g of testosterone to<br />

pregnant sows, on their female and male offspring was studied. Sows were injected at the 8 th and 11 th weeks<br />

of gestation. Control sows received no injection. All piglets were born with normal sized and shaped genitals.<br />

Androgenized female showed a <strong>de</strong>lay, although non-significant (P>0.05), in their onset of puberty, but were<br />

significantly (P

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