Page 482 - Equine Clinical Medicine, Surgery and Reproduction, 2nd Edition

Reproductive system: 2.1 The female reproductive tr act 457

VetBooks.ir 2.64 2.65

2.66 2.67

Figs. 2.64–2.68 (2.64) Thoroughbred mare in first- 2.68
stage parturition and about to foal. Note the elongated
and relaxed vulva, raised tail head and relaxed pelvic
ligaments. (2.65) Second-stage parturition has been
initiated and the foal is presented with the head resting
on the extended forelimbs. Note the broken amnion
wrapped around the limbs of the foal. (2.66) The foal has
been completely expelled and the umbilical cord can be
seen still attached to the placenta in the mare. (2.67) The
mare has now stood up and the cord has been broken.
The umbilical stump is being treated with an antiseptic
spray. (2.68) The foal has just stood and is being licked
by the mare, part of the bonding process.
its neck and forelimbs. Stage one finishes with the • Second stage (Figs. 2.65–2.68). This is a
rupture of the chorioallantois and the release of the rapid and very active event. The time between
yellowish allantoic fluid (‘breaking of waters’). chorioallantoic rupture and the appearance