[Federalist] Seneca in the first century CE: "...unnatural progeny we destroy; we drown even children who at birth are weakly and abnormal."
Similarly, in ancient Greece, abortion was encouraged to limit the number of children in families, as was infanticide for babies born with deformities. The Spartan society highly valued marriages that would strengthen the genetic excellence of the population, and therefore partners were selected based on traits such as physical fitness. The government would even intervene and arrange marriages or force divorces if the couples were judged unfit for each other and thereby incapable of producing strong offspring.