CUTTING EDGE, NEW TOPICS, AND PRACTICAL INFORMATION IN THERIOGENOLOGY
Fig. 5. The foal nasogastric tube is advanced up the umbilical vessel, using slight water pressure, until the tube can no longer be advanced.
mended that mares should not be bred on foal heat after retained fetal membranes (independent of treatment type). A total of 12 mares (all Friesian) were inseminated after the extraction of fetal mem- branes using this technique (three mares on pro- longed foal heat (ovulation by day 15–16), five mares on the second estrus post-partum and four mares in cycles 2 or 3 post-partum). All mares became preg- nant on the first cycle of breeding.
4. Discussion
Regulations dictated by the Royal Netherlands Association of Veterinarians are published for the treatment of retained fetal membranes in the Netherlands.10 Under these guidelines, manual removal of fetal membranes is mandated within 6 hours postpartum if traditional methods for mem- brane removal (i.e., oxytocin administration, uter-
Fig. 6. The tube is held in place by the veterinarian while water is infused into the umbilical vessel for a period of 3–5 minutes. AAEP PROCEEDINGS Vol. 61 2015 481
