We have been trying to get pregnant for 9 months now and still nothing but my partner takes steriods will this make the process longer?

Steroids & Fertilty. Steroids can definitely affect a man's fertility. I assume that your partner is a male. If the steroids are anabolic then he can reduce his sperm count to 0. I have several patients with this condition. The sperm cycle is 72d so it can take 3 mo or more to recover. Get a sperm analysis now and then counseling. He needs to stop for many reasons. Good luck.
Yes. Steroids (illegal kind) will reduce sperm count. Medical steroids (for many illnesses) can also affect reproductive potential but to a lesser extent.