The major customers of abortion in the 19th century were middle- and upper-class native-born white women; and eugenicists raised the concern that these desirable classes would commit “race suicide” and be outbred by undesirable immigrants and poor people.
Conversely they were in favor of abortion and sterilization (frequently forced) for the poor and undesirable.
Conversely they were in favor of abortion and sterilization (frequently forced) for the poor and undesirable.
Not necessarily the same eugenicists, of course.