Restoration of reproductive potential following expiration or removal of melengestrol acetate contraceptive implants in golden lion tamarins (Leontopithecus rosalia)

Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians
C WoodC S Houle

Abstract

Although reversible contraception is important to successful management of small populations, there are concerns about the reversibility of melengestrol acetate (MGA), the most commonly used implant in captive animals. Female golden lion tamarins (Leontopithecus rosalia) placed in potential breeding situations after surgical MGA implant removal showed a 75% return to reproduction within 2 yr, unlike golden-headed tamarins (Leontopithecus chrysomelas), which have had a 29% return to reproduction following implant removal. This rate was indistinguishable from the breeding probability for newly formed pairs involving nonimplanted females. Litter size, stillbirth rate, and infant survival rate were not significantly different between nonimplanted and implant-removed female golden lion tamarins. However, females with implants left in (and assumed to have expired) showed higher stillbirth and infant mortality rates than did females with implants removed. For seven female golden lion tamarins for which reproductive histories before and after MGA implantation were available, litter size was unaffected by MGA implantation and subsequent removal. Infant survival rate for these females appeared to be lower after removal but was indistingu...Continue Reading

Citations

Oct 2, 2015·Reproduction : the Official Journal of the Society for the Study of Fertility·Maurand CappellettiKim Wallen
Sep 14, 2021·American Journal of Primatology·Anneke MorescoDalen W Agnew

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Methods Mentioned

BETA
contraception

Software Mentioned

SAS

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