
Value of transvaginal ultrasound combined with the levels of progesterone and β-human chorionic gonadotropin of pregnant women for diagnosing their threatened abortion during the first trimester of pregnancy
LIU Chao, FANG Yaping, LI Bin, MU Lifeng, LI Zhijie
Chinese Journal of Family Planning ›› 2022, Vol. 30 ›› Issue (6) : 1311.
Value of transvaginal ultrasound combined with the levels of progesterone and β-human chorionic gonadotropin of pregnant women for diagnosing their threatened abortion during the first trimester of pregnancy
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