Is the reason overweight women sometimes struggle with fertility just because the extra weight affects their cycle/ovulation, or are there other reasons??

I’m a good solid 30 (maybe 40) pounds overweight, but my period is extremely regular and I ovulate on Day 14 like clockwork every month, according to my OPK. We just started TTC, and I’m also trying to get healthier. Do you think I should anticipate problems due to my weight? (I know nobody can accurately predict that, I’m just asking for a general feel.) Thanks gals!