Intravaginal progestagen sponges,
followed by pregnant mare's serum gonadotrophin (PMSG) injection were given to does to synchronize oestrous during
the normal breeding season (Menegatos et al., 1995),
induce oestrous out of season (Karatzas et al., 1997) and to improve ovulation rate (Greyling and van Niekerk, 1991).