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Normal Parturition - Anatomy & Physiology (view source)
Revision as of 08:54, 6 August 2008
, 08:54, 6 August 2008→Stage 2
=== Stage 2 ===
=== Stage 2 ===
* Lasts 30 minutes - 4 hours
** Longer in heifers than in cows
** Male calves take longer to be born
* Onset marked by the appearance of the amnoin ('water bag') at the vulva.
* Less frequent straining
* Remains standing at first
* During passage of the head through the vulva, the cow normally goes down and remains recumbent until the calf is born.
* May lie on her side or in sternal recumbency.
* Placental separation occurs more slowly than in the mare.
* Umbillical cord of the calf is shorter than in the foal and generally ruptures as the calf falls from the vulva.
=== Stage 3 ===
=== Stage 3 ===