Abstract 10.1002/zoo.1430140503.abs A contraceptive vaccine made of porcine zonae pellucidae (PZP) was tested in three Przewalski’s mares and five banteng cows. The vaccine antigen consisted of the complete family of glycoproteins of the porcine zona pellucida, including the sperm receptor ZP3. All mares and three of five banteng were inoculated with 2 or 3 i.m. […]