The effect of maternal low flow oxygen administration during the second stage of labor on pregnancy outcome#br#
LI Haiying1, DUAN Lihong1*, LI Qingxue1, LiHong2, FANG Fang1
Journal of Hebei Medical University . 2018, (6): 680 -683 .  DOI: 10.3969/j.issn.10073205.2018.06.015