Inducing Farrowing in Sows by PGF2 alpha and Its Analogues

Prostaglandins F2alpha (PGF2α) or its analogues (e.g. cloprostenols and D cloprostenol) have been used to induce farrowing worldwide in pig farms, including in Thailand. However, the dose, route of administration and timing of injection of these hormones are still controversy. Therefore, the aim of this review is to provide information based on literature search and some experiments which are performed by the authors. The crucial topics are as follows: stillbirth, leading reasons for inducing farrowing, prostaglandins and its analogue, dose and route of administration and how to shorten the duration of farrowing. The dose, route of administration and timing of injection for each hormone will also be mentioned.