Effect of Suckling Stimulation and Milk Yield on Postpartum Ovarian Activity and Uterine Involution in Grazing Beef Cows

Japan Agricultural Research Quarterly
ISSN 00213551
NII recode ID (NCID) AA0068709X
Full text

In beef cows, a milk yield showed an inhibitory effect on both the postpartum ovarian activity and the uterine involution. The suckling stimulation, however, indicated a suppressive effect on the former, while a hastening effect on the latter. This conclusion was derived from the results of multiple regression analyses on suckling cows, which were subjected to restricted sucklings twice a day and early weaning. In estimating adequate intervals from calving to first ovulation, following were the relevant factors in order of decreasing importance: parity > milk yield > body weight changes caused by nutrient conditions > suckling stimulation. The factors affecting uterine involution could also be ranked as follows in decreasing order of importance: parity > milk yield > sucking stimulation. The uterine involution was more stable than the postpartum ovarian activity in terms of the sensitivity to some critical factors

Date of issued
Creator Yoshiaki IZAIKE
Available Online
NII resource type vocabulary Journal Article
Volume 24
Issue 3
spage 209
epage 215
Language eng

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