This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by BAZER, F. W. Articles by ULBERG, L. C. Search for Related Content PubMed PubMed Citation Articles by BAZER, F. W. Articles by ULBERG, L. C.

UTERINE CAPACITY IN GILTS

A review of the literature indicates that injection of gonadotrophic hormones or giving high-level-energy feeds will markedly increase the number of ovulations in polytocous animals. Higher ovulations rates are then followed by an increase in the precentage of embroys which die in utero. This increased embryonic death may be due either to inherent limitations within the individual embryo or to maternal limitations which affect the litter (Runner, 1951). In any event, the number of young at term reamins at a level characteristic for the species. Empbryonic death usually occurs before the time of attachment of the embryo to the endometrium (Boyd, 1965).

Attempts to increase the number of young born either by hormonal superovulation(Flower & Edwards, 1957; Adams, 1960; Hafez, 1964) or by the addition of embryos to the uterine horns (McLaren & Michine, 1959; Adams, 1960) have seldom been sucessful. In some

This article has been cited by other articles:

				G. Wu, F. W. Bazer, J. M. Wallace, and T. E. Spencer BOARD-INVITED REVIEW: Intrauterine growth retardation: Implications for the animal sciences J Anim Sci, September 1, 2006; 84(9): 2316 - 2337. [Abstract] [Full Text] [PDF]

				G. R. Foxcroft, W. T. Dixon, S. Novak, C. T. Putman, S. C. Town, and M. D. A. Vinsky The biological basis for prenatal programming of postnatal performance in pigs J Anim Sci, April 1, 2006; 84(13_suppl): E105 - E. [Abstract] [Full Text] [PDF]

				S C Town, C T Putman, N J Turchinsky, W T Dixon, and G R Foxcroft Number of conceptuses in utero affects porcine fetal muscle development Reproduction, October 1, 2004; 128(4): 443 - 454. [Abstract] [Full Text] [PDF]

				H. Mesa, T. J. Safranski, R. K. Johnson, and W. R. Lamberson Correlated response in placental efficiency in swine selected for an index of components of litter size J Anim Sci, January 1, 2003; 81(1): 74 - 79. [Abstract] [Full Text] [PDF]