Vol. 28 (3) 2007 Neuro endocrinology letters

Chronic levonorgestrel treatment in Macaca sylvanus: effects on perineal swelling size and fecal sex steroid excretion.

OBJECTIVE: Administered levonorgestrel enables contraception under normal cyclicity of the ovaries and does not suppress the development of cyclic perineal swellings. This study investigated the influence of levonorgestrel on fecal gonadal steroid excretion rates and the expression of perineal swelling size.

SETTINGS:.....