REAL

Melengestrol acetate as a tool for inducing early ovulation in transitional mares

López-Bayghen, Consuelo and Zozaya, Heidy and Ocampo, Luis and Brumbaugh, Gordon and Sumano, Héctor (2008) Melengestrol acetate as a tool for inducing early ovulation in transitional mares. Acta Veterinaria Hungarica, 56 (1). pp. 125-131. ISSN 0236-6290

[img] Text
avet.56.2008.1.13.pdf
Restricted to Repository staff only until 31 March 2028.

Download (45kB)

Abstract

The efficacy of melengestrol acetate (MGA) to shorten the vernal transition of mares by synchronising and accelerating the first ovulation of the year after 60 days of phototherapy was determined by ultrasonographic monitoring. Sixteen mares in late transition were fed two doses of MGA (150 mg/mare/day and 100 mg/mare/day, respectively) for 10 days. A luteolytic dose of prostaglandin was administered to each mare one day after the end of MGA treatment. The presence and duration of oestrus, follicular growth, uterine oedema and presence of ovulation were monitored by ultrasonography and the cervical tone was evaluated by rectal palpation. Ovulation was detected in 87.5% of the mares treated with 150 mg MGA/mare/day for 10 days, and in 62.5% of the mares receiving 100 mg MGA/mare/day for 10 days. This was statistically different (P = 0.03) from the untreated control mares having an ovulation rate of 20%. Mares that received 150 mg MGA/day for 10 days had a mean treatment to ovulation interval of 13.1 ± 5.97 days after the end of treatment, while mares that received 100 mg MGA/day for 10 days had a mean of 25.6 ± 10.50 days (P = 0.01) to ovulation. These results suggest that MGA can be used for synchronising and hastening the first ovulation of the year in mares.

Item Type: Article
Subjects: S Agriculture / mezőgazdaság > SV Veterinary science / állatorvostudomány
Depositing User: xKatalin xBarta
Date Deposited: 13 Feb 2017 13:02
Last Modified: 13 Feb 2017 13:02
URI: http://real.mtak.hu/id/eprint/48401

Actions (login required)

Edit Item Edit Item