If i have had an abortion and then i decide to get on birth control will it affect my chances of conception when i want to get pregnant again ?

'No,' but it varies: Tthe generic answer is 'usually no.' One uncomplicated abortion per se is not associated with infertility, but sequelae to abortion(s) can be. Infertility after abortion is usually from adhesion/scarring in the uterine cavity or damage to fallopian tubes. Later gestation abortions and those with significant complications are at particular risk. Good wishes.