Why does a past abortion affect finding a future relationship?

Some guys found out I had an abortion in the past and most of them do not want to be in a relationship with me because of that and it is upsetting me very much and if some guys find out about it they don't want to be in my life. They think I have bad intentions because of my past relationship. What should I do? I really want to find a guy I want to be in a relationship with and it's hard because they may find out about this.
Why does a past abortion affect finding a future relationship?
Post Opinion