Milk and serum progesterone levels in mares after ovulation.
Twenty-four Finnhorse mares were examined by rectal palpation and ultrasonography every 6 h during late oestrus to determine the time of ovulation. Milk and serum samples were collected every 6 h after the detected ovulation for progesterone analysis. The progesterone rises took place within 0-54 h and 0-60 h after ovulation, in milk and serum, respectively. Statistically significant differences (p less than 0.05) in progesterone levels were observed for the first time 12-18 h and 18-24 h after ovulation, in serum and milk, respectively, as compared to progesterone levels 0-6 h after ovulation.
Koskinen
E
E
Agricultural Research Centre, Equine Research Station, Ypäjä, Finland.
Lindeberg
H
H
Kuntsi
H
H
Katila
T
T
D000818:Animals; D005260:Female; D006736:Horses / Q000502:physiology*; D008892:Milk / Q000737:chemistry*; D010060:Ovulation / Q000502:physiology*; D010061:Ovulation Detection / Q000662:veterinary; D011374:Progesterone / Q000032:analysis* / Q000097:blood
D011374:Progesterone