Births of freemartins derived from embryos reconstructed with ear fibroblasts.
J Vet Med Sci
; 63(5): 577-8, 2001 May.
Article
en En
| MEDLINE
| ID: mdl-11411508
ABSTRACT
Although the combination of artificial insemination (AI) and embryo transfer (ET) is effective for preventing large offspring syndrome in clone cattle production, it may cause freemartinism. In this study, 51 reconstructed embryos were transferred to artificially inseminated recipients. Of those 9 twin pregnancies, three delivered male and female offsprings. The females had tufts of long coarse hair and short blind pouch at the vaginal end. At necropsy, hypoplastic testicles and epididymis, which connected to the uterus through the spermatic cord, were found and seminal vesicles were also noted. All females had mixed sex chromosome configuration (60, XX and 60, XY). These results suggest that the combined ET program can cause freemartinism, which reduces the efficiency of clone cattle production.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Inseminación Artificial
/
Transferencia de Embrión
/
Freemartinismo
Límite:
Animals
/
Pregnancy
Idioma:
En
Revista:
J Vet Med Sci
Asunto de la revista:
MEDICINA VETERINARIA
Año:
2001
Tipo del documento:
Article