Studies on the changes of serum LH [lutinizing hormone], FSH [follicle stimulating hormone], and prolactin levels in the puerperal sow
1983
Chung, Y.C. | Kim, C.K. | Lee, K.S. (Chung Ang Univ., Seoul (Korea R.). Coll. of Agriculture)
The purpose of this study was to determine the serum content of LH, FSH and prolactin. Blood samples were collected from day 20 prepartum to 20 postpartum in 8 cows. LH, FSH and prolactin were assayed by radioimmunoassay methods. LH levels increased from 2.3 MIU/ml day + perpartum to 5.8 MIU/ml by day + 2 and remained quite constant thereafter. The mean serum FSH increased from 7.5 MIU/ml day 6 prepartum to 10.0 MIU/ml at the time of parturition, but the difference of LH and FSH patterns reported here provide further evidence that the controlling mechanisms for the two gonadotrophins are independent. Prolactin reached a peak mean level of 68.5 mg/ml at day 0.
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