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.
Felipe
Antonio E
AE
Area de Embriología, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Argentina.
Teruel
Miriam T
MT
Cabodevila
Jorge A
JA
Callejas
Santiago S
SS
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