I am 18; started masturbation when i was 8; now i masturbate daily; am i still able to produce a baby?

Most likely: Your masturbation history will have no effect on your future fertility. However, approximately 15% of sexually active couples without contraception do not conceive within one year. Frequent ejaculations often diminish the quality of sperm in your semen.

Yes you are: Masturbation is a normal activity, although you probably do it more than the average kid.