In Traditional Chinese Medical Theory, the Kidneys rule the reproductive system, sexual health, as well as bones and hair. Cheng Zi Wan uses yin yang huo or Horny Goat Weed for it’s tonifying effects on the kidney system to increase fertility in both men and women. For women, this herbal combination may support regular ovulation and reproductive health. For men, it may increase sperm count overall well-being. Take 10 pills, 3 times per day.