Antifertility effect of Tinospora cordifolia (Willd.) stem extract in male rats.

Oral administration of 70% methanolic extract of T. cordifolia stem to male rats at the dose level of 100 mg/rat/day for 60 days did not cause body weight loss but decreased the weight of testes, epididymis, seminal vesicle and ventral prostate in a significant manner. Sperm motility as well as sperm density were reduced significantly which resulted in reduction of male fertility by 100%. The stem extract brought about an interference with spermatogenesis. The round spermatids were decreased by 73.12%. However, the population of preleptotene and pachytene spermatocytes were decreased by 47.60% and 52.85% respectively, followed by secondary spermatocytes (48.10%). Leydig cell nuclear area and mature Leydig cell numbers were significantly reduced when compared with controls. Serum testosterone levels showed significant reduction after Tinospora extract feeding. Seminiferous tubule diameter, Leydig cell nuclear area as well as cross sectional surface area of Sertoli cells were reduced significantly when compared to controls. Biochemical parameters i.e. protein, sialic acid, glycogen contents of testes decreased significantly. Seminal vesicular fructose also depleted whereas, testicular cholesterol was elevated significantly followed by a reduction in testosterone levels. These results suggested antifertility effects of the stem extract of T. cordifolia in male rats.