中国计划生育学杂志
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剖宫产史及宫内节育器类型对发生宫内节育器嵌顿影响
河北省唐山市妇幼保健院( 063000)
Influence of cesarean section history and type of intrauterine device on occurrence of intrauterine device incarceration
Tangshan Maternal and Child Health Care Hospital,Tangshan, Hebei Province, 063000