New treatments associated with timed artificial insemination in small ruminants

Reproduction, Fertility and Development - Tập 16 Số 4 - Trang 403 - 2004
A. Menchaca1, E. Rubianes2,1
1Laboratorio de Fisiología de la Reproducción, Facultad de Veterinaria, Lasplaces 1550, Montevideo, Uruguay.
2Departmento de Producción Animal y Pasturas, Facultad de Agronomía, Garzón 780, Montevideo, Uruguay.

Tóm tắt

Timed artificial insemination (TAI) is a very important tool in production systems, as it has a direct impact on cost-efficiency by reducing labour resulting from oestrus detection. However, to make TAI commercially feasible, hormonal treatments need to assure acceptable pregnancy rates and be economically viable. Recent advances in the knowledge of ovarian physiology (e.g. determination of follicular waves, sensitivity of the early corpus luteum) in small ruminants allowed the development of new treatments focused on an efficient estimation and synchronisation of the time of ovulation of the females of a treated flock/herd. In this review we summarise new information and concepts in the hormonal control of the life span of the corpus luteum, as well as methods to manipulate follicular growth in small ruminants. Additionally, we elaborate on recent studies concerning the use of TAI associated with short progestogen treatment in goats and the newly developed Synchrovine™ protocol (two doses of prostaglandin F2α given seven days apart) in sheep.

Từ khóa


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Reproduction, Fertility and Development

Tập 16 Số 4

403

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