We've discussed this before. The actual (and long-lived ) Eugenic legislation was Paragraph 219a of the Nazi penal code set up to preserve the vitality of the "Aryan" race: which was still blocking access to abortion in Germany until three years ago.

There is no "lebensunwertes lebens" or anything to do with "unworthiness" mentioned in In the British 1967 legislation, though it does make provision for abortion in the case of seriously handicap, what is actually make paramount is the welfare of the woman: both physical and mental.