Impact of stress on female infertility and pregnancy has been well documented. Below study, published in journal of Fertility and Sterility, shows shows male reproductive health is similarly affected by it. The researchers are confident the correlation between stress and sperm parameters is clear.
Acupuncture has been shown to improve sperm quality, it has also been shown to help with stress. Researchers at the Georgetown University Medical Center have shown that acupuncture interferes with the very mechanism of stress.
Effects of work and life stress on semen quality