Consider ashwagandha

Withania somnifera, a herb used for medical purposes, has a long history in India. According to studies, ashwagandha may increase testosterone levels, thereby enhancing male fertility.

One study found that ingesting 675 mg of ashwagandha root extract daily for three months dramatically increased fertility in males with low sperm cell counts. In comparison to levels at the start of the trial, it specifically boosted sperm counts by 167%, semen volume by 53%, and sperm motility by 57%. These advantages might have some contribution from higher testosterone levels. According to a study conducted on 57 young men who had been engaging in a strength-training program, a daily intake of 600 mg of ashwagandha root extract dramatically enhanced testosterone levels, muscle mass, and strength when compared to a placebo.