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Antiovulatory action of anordrin in the cynomolgus monkey (Macaca fascicularis)

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Advances in Contraception

Abstract

Anordrin (2α,17α-diethynyl-A-nor-5α-androstane-2β,17β-diol dipropionate) was studied for its antiovulatory potency in the cynomolgus monkey. Anordrin, administered daily on days 9–13 of the menstrual cycle in doses of 4.0 and 8.0 mg/kg body weight, did not inhibit luteal activity in the cycle in which it was given, but delayed the development of ovarian follicles for 5 to 6 months. When a single low dose (0.1 or 0.2 mg/kg b.w.) was administered during the first 3 days of the menstrual cycle, follicular maturation was delayed such that luteal activity was not observed for an average of 26 and 39 days, respectively, and pregnanediol in the ensuing luteal phases was significantly decreased. Anordrin appears to inhibit follicular development when given during the stage of follicular recruitment.

Resumé

On a étudié sur la guenon du genre cynomolgus le pouvoir antiovulatoire de l'anordrin (diproprionate de 2α,17α-diéthynyl-A-nor-5α-androstène-2β,17β-diol). Administré quotidiennement aux jours 9 à 13 du cycle menstruel aux doses de 4,0 et 8,0 mg/kg de poids corporel, l'anordrin n'a pas inhibé l'activité lutéale pendant le cycle au cours duquel il a été administré, mais il a retardé le développement des follicules ovariens pendant 5 à 6 mois. L'administration d'une faible dose unique (0,1 our 0,2 mg/kg de poids corporel) pendant les 3 premiers jours du cycle menstruel a retardé la maturation folliculaire à un tel point qu'aucune activité lutéale n'a été observée pendant, respectivement, 26 et 39 jours en moyenne et que le prégnandiol était en diminution significative pendant les phases lutéales suivantes. L'anordrin semble inhiber le développement folliculaire lorsqu'il est administré pendant la phase de mobilisation folliculaire.

Resumen

Se estudió en la mona del género cynomolgus el poder anovulatorio del anordrin (dipropionato de 2α,17α-dietinil-A-nor-5α-androstano-2β,17β-diol). Administrado diariamente en los días 9 a 13 del ciclo menstrual en dosis de 4,0 y 8,0 mg/kg de peso corporal, el anordrin no inhibió la actividad lútea durante el ciclo en el cual fue administrado, pero retrasó el desarrollo de los folículos ováricos durante 5 a 6 meses. La administración de una dosis baja única (0,1 ó 0,2 mg/kg de peso corporal) durante los 3 primeros días del ciclo menstrual retrasó la madurez folicular a tal punto que no se observó ninguna actividad lútea durante 26 y 39 días en promedio, respectivamente, y el pregnandiol disminuyó significativamente en las fases lúteas siguientes. El anordrin parecer inhibir el desarrollo folicular cuando se administra durante la fase de movilización folicular.

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Mehta, R.R., Chatterton, R.T. Antiovulatory action of anordrin in the cynomolgus monkey (Macaca fascicularis). Adv Contracept 7, 21–28 (1991). https://doi.org/10.1007/BF01850715

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  • DOI: https://doi.org/10.1007/BF01850715

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