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Drugs for the Control of Reproduction

A variety of drugs have been developed to control reproduction of mares. These drugs are all either the natural hormone or synthetic versions of the hormone that is made to be more effective when given to a mare.

Hormone
Effect
Drug
PGF2a Regression of the CL
Induction of abortion		 Lutalyse, Equimate, Estrumate, Synchrocept
Progesterone

suppression of estrus
synchronization of ovulation
pregnancy maintenance

 ReguMate, progesterone in oil, P+ (long acting)
Estrogen

estrus behavior

estradiol-17-B
LH ovulation induction hCG, recombinant eLH
GnRH

hastens breeding season (transitional mares only) ovulation induction
treat low libido or sperm production in stallions

 Deslorelin, Ovuplant, osmotic pumps
Oxytocin Parturition induction
expulsion of retained placenta		 Oxytocin

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Hormone Manipulation

Cycles of the Mare

Hormones in the Mare

Potential Drugs

Early Breeding

Cycling Mares

Short Cycling

Abortion

Control of Ovulation

Estrogen

Estrus Prevention

Stallion Reproduction

Low Libido

Review Quiz