單項(xiàng)選擇題

關(guān)于胎心音以下哪項(xiàng)不對(duì)()

A.妊娠24~28周可用聽(tīng)診器經(jīng)孕婦腹壁聽(tīng)到胎心音
B.妊娠7周后可用超聲多普勒探及胎心音
C.聽(tīng)到胎心音可確診為妊娠活胎
D.妊娠24周以后,胎心音多在胎背所在側(cè)聽(tīng)得最清楚
E.聽(tīng)到胎心音應(yīng)注意與子宮雜音、臍帶音、腹主動(dòng)脈音等鑒別

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