Ovarian responses of anestrous ewes to the "ram effect"

Sammanfattning

Ovarian responses to the "ram effect" were characterized in 11 anestrous Corriedale ewes. In seven ewes, there was a luteinizing hormone (LH) surge 36.7 +/- 12.3 h (mean SEM) after ram introduction and a concurrent increase (P < 0.05) in serum follicle stimulating hormone (FSH). Ovarian responses (monitored ultrasonographically) were highly variable. One ewe had two luteal phases (short and normal, respectively), three had delayed ovulation (days 5-7), two had luteinization of non-ovulatory follicles, one developed a luteinized follicular cyst, and four had no luteal phase.

Nyckelord

ram effect; ovarian follicular dynamics; seasonal anestrus; ultrasonography; gonadotropin

Publicerad i

Canadian Journal of Animal Science
2002, volym: 82, nummer: 4, sidor: 599-602
Utgivare: AGRICULTURAL INST CANADA

SLU författare

• Forsberg, Mats

  • Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Gynekologi, obstetrik och reproduktionsmedicin

Publikationens identifierare

• DOI: https://doi.org/10.4141/A02-005

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/66