does were allocated to groups for estrous synchronization,
using intravaginal
pessaries impregnated with fluorgestone acetate (FGA; n = 20), medroxyprogesterone acetate (MAP; n = 20) or
controlled internal drug release devices (CIDR; n = 20). All intravaginal progestagens were administered for a period of
13 days. At pessary removal all does were injected with 5mg prostaglandin F-20.