Yeah, we need to know your stats to give you more advise re: a var cycle.
But in regards to your general question. All steriods have a potential to harm a persons body and could interfer with future pregnancies. However, the probability of it harming you having children in the future is low given that you use it correctly, dont abuse it, and that you post cycle therapy (pct) properly. However, it can directly effect your menstrual cycle. Women have reported they're periods becoming irregular or stopping altogether while on Anavar (var). Most have also reported that once off cycle and post cycle therapy (pct) completed their menstration returned to normal.