[中西醫(yī)結(jié)合婦科學(xué)]當(dāng)進(jìn)入第二產(chǎn)程時(shí)何時(shí)開(kāi)始保護(hù)會(huì)陰(&nb...

原題:
[中西醫(yī)結(jié)合婦科學(xué)]當(dāng)進(jìn)入第二產(chǎn)程時(shí)何時(shí)開(kāi)始保護(hù)會(huì)陰(  )

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選項(xiàng):
A.宮口開(kāi)全時(shí)
B.兒頭撥露使會(huì)陰后聯(lián)合緊張時(shí)
C.兒頭著冠時(shí)
D.兒頭仰伸時(shí)
E.兒頭俯屈時(shí)
答案：
B