If you are using an ancillary drug like finasteride you would want to be careful. When I got a prescription for it my doctor told me that pregnant women shouldnt touch the pills and I should not attempt to have any kids while taking the drug because it can cause deformities in babies.
The above is VERY IMPORTANT. There are several other "Catragory X" during Prego time meds also. Betamethazone comes to mind...
The answer to your 1st question is NO! Lots and lots of us, including me have great kids.
The issue is having kids at all if you permanently affect your sperm production & Motility (swimming abiliity) w/ AAS.
That's the main reason I feel young guys should cycle off after 4-5months or so max. Make no doubt, It'll not be a peach when you come off a run like that.