Dippert, K D Initiation of superovulation in mares 5 or 12 days after ovulation using equine pituitary extract with or without GnRH analogue. [electronic resource] - Theriogenology Oct 1992 - 695-710 p. digital Publication Type: Journal Article ISSN: 0093-691X Standard No.: 10.1016/0093-691x(92)90032-m doi