Data/hora: 20/09/2024 10:01:06

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	20/09/2017	
Data da última atualização: 	20/09/2017	
Autoria: 	ALLISTON, C. W.; ULBERG, L. C.	
Título: 	Early pregnancy loss in sheep at ambient temperatures of 70° and 90° f. as determined by embryo transfer.	
Ano de publicação: 	1961	
Fonte/Imprenta: 	Journal of Animal Science, v. 20, n. 3, p. 608-613, Aug. 1961.	
DOI: 	10.2527/jas1961.203608x	
Idioma: 	Inglês	
Conteúdo: 	Early embryo development in ewes maintained in ambient temperatures of 70° F. or 90° F. was studied by means of embryo transfers. Transfers were performed approximately 72 hours after onset of estrus and successful transfers were verified by a laporatomy performed 25?30 days later. Where both donor and recipient were maintained at 70° F., 13 of 23 (56.5%) ?between animal? transfers were successful as compared with 2 of 21 (9.5%) where donor and recipient were maintained at 90° F. and 70° F. respectively. Therefore, some detrimental action had occurred by 3 days after onset of estrus in ewes at 90dg F. Although morphological differences were not apparent at the time of transfer, embryonic death occurred at a later stage of development in uteri known to be capable of supporting embryonic growth. Where embryos were transferred from donor to recipient ewes maintained at 70° F. and 90° F. respectively, 6 of 25 (24.0%) transfers were successful. To evaluate possible harmful effects of transfer, embryos were either not transferred or were replaced in the original donor when multiple ovulations occurred. Five of seven (71.4%) and none of four non-transferred embryos continued development in 70° F. and 90° F. groups respectively, assuming one embryo was produced per corpus luteum. Six of eight (75.0%) ?within animal? transfers were successful in the 70° F. group but no pregnancies resulted from two such transfers in the 90° F. group.	
Thesaurus Nal: 	Embryo transfer; Sheep.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (35010-1) - ADD - AP - PP -  -  -  - DIS