[Evaluation of factors related to perinatal mortality - with special reference to cases of pregnancy toxemias].
D005260:Female; D005313:Fetal Death / Q000209:etiology; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007564:Japan; D008428:Maternal Mortality; D011225:Pre-Eclampsia / Q000150:complications*; D011247:Pregnancy