Parturition – Farrowing
To appreciate the intricacies of the farrowing process it is necessary to understand the anatomy of the pelvis and the reproductive tract at farrowing. As farrowing approaches the vulva becomes enlarged, together with the vagina that leads to the cervix or opening into the womb. A small lubricated hand and arm can be inserted into the vagina to just beyond the cervix without damage. The neck of the cervix opens into the two long horns of the womb that contain the piglets. (Fig.8-10).
The umbilical cord of the piglet terminates at the placenta which is attached to the surface of the womb. Nutrients pass from the blood of the sow across the placenta and into the developing piglet. The placenta also extends around the piglet as a sac which contains fluids and waste materials, produced by the piglet during its growth. The placenta and the sac are referred to as the afterbirth.
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