Niche Question: Fertility

I’m working on narrowing my scope a bit. I am returning to practice as a nutritionist after several years, and am hoping to get super specific as I re-build my practice. I specialize in preconception, prenatal and postnatal health. For my new niche – at least for getting back up and running – what do you think of “People who have been told by their physicians that they need to lose weight to get pregnant”? I’m thinking women who are working professionals, used to being in control, who are now feeling helpless/out of control, super motivated and want results NOW, want someone who knows the ins/outs of fertility treatments, and knows that diets haven’t worked for them before. Do I need to get more specific?