continues to push, front legs and then a nose
should appear inside the amnionic sac. The foal
is usually delivered within 15 to 30 minutes after
the mare breaks her water.
Occasionally, a different series of events occurs
during the labour process. Premature separation
of the outer placental membrane from the
uterine wall may lead to protrusion of the intact
fluid-filled chorioallantois through the vulva.
The dark red colour of the outer surface of the
chorioallantois gives rise to common term for
premature separation of the placenta – “redbag”.
Confirmation of the condition may be made by
observing the cervical star on the chorionic
surface.
Failure of the outer placental membrane to
rupture during labour and the subsequent
separation of the attachments between the uterus
and placenta lead to a rapid decrease in oxygen
transport to the foetus. As a consequence, the
foetus may suffer from lack of oxygen (hypoxia)
or may die of asphyxiation if the condition is
prolonged or progresses.
A thin, transparent, greyish-white membrane, the amnion, should begin
protruding through the vulva within 5 to 10 minutes after the mare
breaks her water.
Owners or foaling personnel must quickly
recognize the red bag condition and intervene
immediately. The placental membrane should
immediately be opened too, with a sharp
instrument such as a knife or scissors. This
will result in a release of allantoic fluid and
a transient delay in uterine contractions.
Veterinary assistance should be summoned and
the foal delivered as soon as possible. Oxygen
should be administered to the newborn foal if
available. Foals may develop problems associated
with hypoxia even though they may appear to b