AbstractsBiology & Animal Science

Spontaneous abortion in man is a subject important to workers in many biological fields  – to the obstetrician who must deal not only with the event itself, but also with its psychological and social aspects; to the demographer who should take account of it in his analyses of population structure and change; to the investigator of reproductive physiology who attempts to find the cause of what is one of the most frequent abnormalities of pregnancy; to the geneticist who tries to assess the role of heredity in the production of such abnormalities; and to the biometrician who is required to find techniques capable of dealing with the statistics of abortion.