Embryos of different ages transferred to the rat oviduct enter the uterus at different times

M. E. Ortiz, C. LLados, H. B. Croxatto

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Indirect evidence of embryo signalling to the oviduct was sought in rats by examining the transport of embryos of different ages. One-cell or four-cell embryos were transferred to the oviducts of recipient rats on Day 1 of pregnancy, and the number, condition, and location of native and transferred embryos was assessed on Day 4. To control for the effect of the presence of foreign embryos and excess number of eggs and the transfer procedure upon the fate of native embryos, other groups of rats were sham-operated or left undisturbed. Recipients had a mean number of ova significantly higher than controls. In controls and recipients of 1-cell embryos, the majority of eggs reached the morula stage and all of them were located in the oviducts. In those animals receiving 4-cell embryos, half of the eggs had reached the blastocyst stage and 28% were in the uteri (p < 0.005). These results support the idea that advanced embryos can influence the timing of their entrance to the uterus in rats.

Original languageEnglish
Pages (from-to)381-384
Number of pages4
JournalBiology of Reproduction
Volume41
Issue number3
DOIs
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Reproductive Medicine
  • Cell Biology

Fingerprint

Dive into the research topics of 'Embryos of different ages transferred to the rat oviduct enter the uterus at different times'. Together they form a unique fingerprint.

Cite this