Artificial insemination in the anoestrous and the postpartum white rhinoceros using GnRH analogue to induce ovulation.
Theriogenology
; 67(9): 1473-84, 2007 Jun.
Article
en En
| MEDLINE
| ID: mdl-17451805
The objective of this study was to develop AI and to achieve first time pregnancy in a nulliparous rhinoceros. For this, one 24-year-old irregular cycling female white rhinoceros was selected, which had never been mated. The endocrine function was monitored by faecal and serum pregnane analysis. Ultrasound determined the optimal day for AI by measuring follicle sizes of 2.0, 2.6, 3.0, 3.2 cm on days -6, -4, -1, 0 of the induced oestrous cycle, respectively. AI was performed and ovulation induced when a pre-ovulatory-sized follicle was present using GnRH analogue, deslorelin. Fresh semen was deposited in the uterine horn using a patented AI catheter overcoming the hymeneal membrane and torturous cervical folds non-surgically. Moreover, ultrasound monitoring of the uterine involution and ovarian activity on days 16, 26, 30 postpartum facilitated the induction of and the AI on the first postpartum oestrous in a rhinoceros using GnRH analogue. Two consecutive pregnancies were achieved by AI for the first time in the rhinoceros. Pregnancies were diagnosed by elevated serum and faecal 20-oxo-pregnane concentrations. In addition ultrasound measured biometric parameters of the two foetuses on days 86 and 133 of gestation. Two female calves were born after 490 and 502 days of gestation, yet one calf was stillborn. AI in rhinoceros might now be used as assisted reproduction technology tool to boost critically small captive rhinoceros populations.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ovulación
/
Perisodáctilos
/
Inseminación Artificial
/
Hormona Liberadora de Gonadotropina
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Theriogenology
Año:
2007
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Estados Unidos