| Popis: |
Failure to passage a part or all of the allantochorionic membrane with or without the amniotic membranes within a prescribed period of the time after parturition is known as Retention of the Fetal Membranes (RFM). The length of time for expulsion of placenta in mare varies among authors from 30 minutes to 6-12 hours Vandeplassche [1], Blanchard [2] and Provercher [3]. This condition is reported to occur with a frequency of 2 to 10.5% in draught horses Allen [4]. The portion of the membranes most likely to be retained and the condition occurs more frequently in mares which have undergone abortion, dystocia, embryotomy and caesarean section Vandeplassche [1]. |
