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

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

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

27 Citas (Scopus)


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.

Idioma originalInglés
Páginas (desde-hasta)381-384
Número de páginas4
PublicaciónBiology of Reproduction
EstadoPublicada - 1989

Áreas temáticas de ASJC Scopus

  • Medicina reproductiva
  • Biología celular


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