Pre-implantational timetable of embryonal development of Myocastor coypus (Coypu).
The purpose of the present study was to determine the chronology of the pre-implantation embryonic development in Myocastor coypus (coypu). It was carried out by daily colpocytological examination and controlled mating of 33 females. Oocytes and embryos were obtained by flushing from day 0 to day 10 post-coitus (p.c.). On day 1 p.c., oocytes predominated whereas on day 2 p.c. zygotes were predominant. The cleavage period was from day 3 to day 6 p.c.. Morulae were collected from day 6 to day 9 p.c., whereas blastocysts were collected on days 8 and 9. From oviduct flushing, the embryos in the zygote stage and up to the morula stage with less than a 30-cell stage were recovered. Embryos in the morula stage with 30 or more cells and up to the growing blastocyst stage were collected from the flushing of hemiuteri.
Area de Embriología, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Argentina.
Antonio E
AE
Felipe
Miriam T
MT
Teruel
Jorge A
JA
Cabodevila
Santiago S
SS
Callejas
D000818:Animals; D001755:Blastocyst / Q000502:physiology; D002970:Cleavage Stage, Ovum / Q000502:physiology*; D047108:Embryonic Development; D005314:Embryonic and Fetal Development / Q000502:physiology*; D005260:Female; D009028:Morula / Q000502:physiology; D009865:Oocytes / Q000502:physiology; D011247:Pregnancy; D012377:Rodentia / Q000196:embryology*; D013997:Time Factors; D015053:Zygote / Q000502:physiology