My twins are almost 3 and my husband and I would love to have ONE more. The twins are fraternal and we conceived them naturally after only trying for one month, so I have a feeling I am super-fertile. I'm also tall and twins run in my family (both of these traits increase chances of conceiving twins). Does anyone know if there are ways to 'prevent' having twins or releasing 2 eggs at once? Are there any tests? Thanks for any advice!