The incidence of pregnancy tumors and their probable relation to the embryo's sex.
D004622:Embryo, Mammalian; D005260:Female; D005882:Gingival Diseases / Q000453:epidemiology*; D006099:Granuloma / Q000453:epidemiology; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D012737:Sex Factors