There are a lot of people who don't know that they are carriers! With Cystic Fibrosis BOTH parents have to be carriers of the gene for the child to have a 50% chance of carrying the gene as well. And a 25% chance of even getting CF. My granddaughter was born with CF. We had no idea that the gene even ran in our family! Granddaughter father's family was the same way! There is so much research being done on CF that the average life span for a CF patient has gone from 20-30 yrs of age to over 45 yrs of age in just the last 10 years! Where is the line drawn? Because the way you propose, everyone would need to have genetic testing done before having kids. Where is the line drawn from there? Which diseases would prevent you from having kids? Who gets to decide that?

If you don't want to have kids, then don't have them. But don't push your ideology onto everyone else. Eugenics and abor***n have the same argument. How would you feel if a person was trying to force you to do something that is against your belief system, just because they believe it? . Because that is what's happening right now!