What did hitler think could be done to stop handicapped children from being born?

Hitler said that during war, it is the best time to get rid of the ill that cannot be cured. Hitler only considered so many religions and races to be up to his level, and if you weren't, you were killed. He thought that the handicapped were not, so he started the 'euthanasia program', which stated for all ill people that cannot be cured, to be killed. Handicapped newborns and children were given an injection that killed them, or were either starved to death.