Withania somnifera Improves Semen Quality in Stress-Related Male Fertility
Bar diagram showing average serum cortisol levels at 8 a.m.
(a) and 4 p.m. (b) in patients before and after treatment with
W. somnifera. The asterisks on bars of pretreatment group show significant
difference from control and posttreatment group show significant difference from pretreatment.
The error bars show standard deviation.