Fertility parameters of dairy cows with cystic ovarian disease after treatment with gonadotrophin-releasing hormone.
Fertility data were collected every four weeks for 10 years from 40 herds of Holstein-Friesian dairy cattle. The data collected during 925 lactations from cows with cystic ovarian disease which were treated with 500 microg gonadorelin were compared with data from a control group of 13,869 normal lactations. The intervals between parturition and first insemination and between parturition and conception were significantly shorter (P<0.001) in the normal cows, but the interval between first insemination and conception was not. The overall conception rate tended to be higher (P<0.10) in the normal cows, but the conception rate after the first insemination was significantly higher (P<0.001) and the number of services per conception was significantly lower (P=0.008) in the normal cows.
Hooijer
G A
GA
Veterinary Practice Mid-Fryslân, Akkrum, The Netherlands.
van Oijen
M A
MA
Frankena
K
K
Valks
M M
MM
D000818:Animals; D016022:Case-Control Studies; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy*; D003612:Dairying; D005260:Female; D005300:Fertility Agents, Female / Q000627:therapeutic use*; D007987:Gonadotropin-Releasing Hormone / Q000627:therapeutic use*; D007247:Infertility, Female / Q000188:drug therapy / Q000662:veterinary*; D010048:Ovarian Cysts / Q000188:drug therapy / Q000662:veterinary*; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000662:veterinary
D005300:Fertility Agents, Female; D007987:Gonadotropin-Releasing Hormone