Contraception in felids

Theriogenology
L Munson

Abstract

Contraceptives are used for reversible reproductive control in genetically valuable wild felids, as permanent reproductive control in generic wild felids, and as an economically practicable means to control feral cats. The progestin contraceptives, megestrol acetate, melengesterol acetate, medroxyprogesterone acetate, and levonorgestrol (administered orally, in implants, or as depot injections), are effective in preventing pregnancy. However, long-term use is associated with endometrial hyperplasia, endometrial cancer, and mammary cancer. Gonadotropin releasing hormone analogs or luteinizing hormone vaccines that achieve contraception by suppressing ovarian or testicular function, do not have the adverse health effects of progestins. However, reliable reversibility has not been demonstrated, and male secondary sex characteristics may be suppressed. Bisdiamines also inhibit spermatogenesis and lower circulating testosterone concentrations in treated male cats. Porcine zona pellucida vaccines are ineffective contraceptives in felids and may cause serious health problems when combined with some adjuvants. Because of the limited availability of non-progestin contraceptives and side effects associated with some agents, widespread ap...Continue Reading

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Citations

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