There isn't really much research on bone broth specifically for fertility. However, a good diet is good for fertility. You want to make sure you get plenty of fruits, veg, omega-3 fats, & enough protein. Ideally take a prenatal vitamin.
Bone broth is a good source of protein though, so if you like it, great. If you find it gross, just choose other protein rich foods. There isn't any magic food for fertility, just as long as all nutrient needs are met.