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 ROBERTS, C. M. Articles by WEIR, B. J. Search for Related Content PubMed PubMed Citation Articles by ROBERTS, C. M. Articles by WEIR, B. J.

IMPLANTATION IN THE PLAINS VISCACHA, LAGOSTOMUS MAXIMUS

Summary.: Accurately dated pregnancies were obtained in order to determine the time and mode of implantation in the plains viscacha, Lagostomus maximus. Implantation was completely interstitial and occurred antimesometrially on Day 18 post coitum. From each animal, very large numbers of single-celled and fragmenting eggs and relatively few blastocysts were flushed from the uterus up to the time of implantation. They were found at the ovarian end of the uterine horns, indicating that the blastocysts do not become spaced until just before implantation. Up to five blastocysts implanted progressively in each horn from the cervical to the ovarian end.

No morphological or histological differences could be detected along the length of the uterus. The significance of these findings is discussed in relation to the fact that only those fetuses nearest the cervix in each uterine horn survive whilst the others are resorbed early in pregnancy.

This article has been cited by other articles:

				F. Jensen, M. A. Willis, N. P. Leopardo, M. B. Espinosa, and A. D. Vitullo The Ovary of the Gestating South American Plains Vizcacha (Lagostomus maximus): Suppressed Apoptosis and Corpora Lutea Persistence Biol Reprod, August 1, 2008; 79(2): 240 - 246. [Abstract] [Full Text] [PDF]