Role of Withania somnifera (Ashwagandha) in the management of male infertility 

From 2018 this comprehensive review assessed the available evidence supporting use of Withania somnifera extracts on the management of male fertility concerns. Specifically relating to semen quality, sperm count, motility and androgens. Authors concluded that preclinical evidence supports the reduction in oxidative stress related to male infertility and may offer a promising therapeutic option. 

References:

 Sengupta, P., Agarwal, A., Pogrebetskaya, M., Roychoudhury, S., Durairajanayagam, D., & Henkel, R. (2018). Role of Withania somnifera (Ashwagandha) in the management of male infertility. Reproductive biomedicine online, 36(3), 311–326. https://doi.org/10.1016/j.rbmo.2017.11.007