A.胎兒頭向下彎B.母體宮縮無(wú)力C.母體努責(zé)無(wú)力D.子宮頸口開(kāi)張不全
A.產(chǎn)力性難產(chǎn)B.產(chǎn)道性難產(chǎn)C.胎兒性難產(chǎn)D.營(yíng)養(yǎng)不良性難產(chǎn)