Infertility is quite common, affecting about 15 percent of couples, according to the National Library of Medicine. Fortunately, infertility can sometimes be reversed and women can go on to have babies. In fact, conventional medical therapies can reverse infertility in 85 to 90 percent of all cases.

Most men make millions of new sperm every day, but men older than 40 have fewer healthy sperm than younger men. The amount of semen (the fluid that contains sperm) and sperm motility (ability to move towards an egg) decrease continually between the ages of 20 and 80.