Details

Autor(en) / Beteiligte

• Menchaca, Alejo
• Rubianes, Edgardo

Titel

New treatments associated with timed artificial insemination in small ruminants

Ist Teil von

• Reproduction fertility and development, 2004-01, Vol.16 (4), p.403

Ort / Verlag

Australia

Erscheinungsjahr

2004

Quelle

MEDLINE

Beschreibungen/Notizen

• 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 F(2alpha) given seven days apart) in sheep.