I don't know about fertility, but my mom have had us on it ever since I can remember. We take it for stomach aches, cleansing, indigestion, light headedness, etc. My mom is 84 years old and is not on any medication, just drinks her apple cider vinegar (ACV) and water twice daily. We also use it for hair (stops shedding if you rinse or wash with it), pus bumps (pulls the pus and allows the bump to pop itself, better than using epsom salt), arthritis and swollen feet (foot soak). I also bathe my girls in it when they itch or have an allergy outbreak from something outdoors. Also, if you burn yourself while cooking. If you put ACV on a cotton ball or towel and place it on the burn, it will not have a blister. I also take it mixed with honey as a cough medicine. So I say take it anyway, it couldn't hurt. ACV is my go to medicine. I don't know about the studies, but I know what it does for us. Love it!