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Agricultural News


Glenn Selk Explains the Third Stage of Calving: Shedding of Fetal Membranes

Wed, 26 Feb 2014 11:29:51 CST

Glenn Selk Explains the Third Stage of Calving: Shedding of Fetal Membranes
Glenn Selk, Oklahoma State University Emeritus Extension Animal Scientist, writes in the latest Cow-Calf Newsletter:


The process of “calving” or parturition in beef cattle is defined by three stages. Stage I occurs about 4 to 24 hours prior to calving. The major event during stage I is the dilation of the cervix. Stage II occurs in about 30 minutes in adult cows and about 1 hour in first calf heifers (when all goes well) and is the time when the calf passes through the birth canal and is delivered into the world. The third stage of calving is the shedding of the placenta or fetal membranes. In cattle this normally occurs in less than eight to 12 hours. The membranes are considered retained if after 12 hours they have not been shed. In some rare cases, the entire placenta is held in the uterus so there is no exposed portion. This condition may go unnoticed until the cow shows an abnormal uterine discharge or an odor characteristic of tissue degeneration.


Years ago it was considered necessary to remove the membranes by manually unbuttoning the attachments. However, research has shown that improper manual removal can be detrimental to uterine health and future conception rates. When a cow calf operator notices a cow that “did not clean” in 12 hours after calving, close observation is suggested. If the cow shows any signs of ill health, such as droopy ears, lethargic behavior, or poor appetite, this may indicate that an infection of the uterus has begun. Contact your local large animal veterinarian for the proper management of retained placenta. Administration of antibiotics usually will help against infection and the placenta will usually slough in four to seven days.


More information about working with cows and heifers at calving time can be found at the Oklahoma State University Extension publication E-1006 "Calving Time Management for Beef Cows and Heifers".



   

 

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