Effect of living conditions on the development of multiplets born in the Danzig Province in 1957-1971.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006128:Growth; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology / Q000235:genetics; D007360:Intelligence; D007859:Learning Disabilities / Q000209:etiology / Q000235:genetics; D008297:Male; D011044:Poland; D011247:Pregnancy; D011783:Quadruplets; D011811:Quintuplets; D012111:Residence Characteristics; D012931:Social Environment; D014310:Triplets