Pregnancy rate after fixed-time transfer of cryopreserved embryos collected by non-surgical route in Lacaune sheep.
Reprod Domest Anim
; 54(11): 1493-1496, 2019 Nov.
Article
en En
| MEDLINE
| ID: mdl-31408572
ABSTRACT
This study investigated the feasibility of applying fixed-time (cryopreserved) embryo transfer in ewes. Embryos (n = 106) were non-surgically recovered from superovulated donors (n = 39) on day 6-7 after oestrus. Straws containing one or two embryos (morulae and/or blastocysts) subjected to either slow freezing (SF, n = 62) or vitrification (VT, n = 44) were randomly used within fixed-time embryo transfer on Day 8.5. Recipient ewes were nulliparous (n = 58) bearing corpora lutea after synchronous oestrous induction protocol. The pregnancy rate was higher (p = .03) in SF (39.4%) than VT (16.9%) and survival rate tended (p = .08) to be higher in SF than in VT (25.8% vs. 15.9%). Lambing rates were similar (p = .13) between SF (20.9%) and VT (15.9%). Embryos recovered by non-surgical route after cervical dilation treatment and later cryopreserved by either slow freezing or vitrification produced reasonable pregnancy rates after FTET.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Criopreservación
/
Índice de Embarazo
/
Transferencia de Embrión
Tipo de estudio:
Guideline
Límite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Reprod Domest Anim
Asunto de la revista:
MEDICINA REPRODUTIVA
/
MEDICINA VETERINARIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Brasil