

Predictive value of serum progesterone and β-hCG combined with B-ultrasound at 5~8 gestational weeks for prognosis of threatened abortion#br#
Xiong Rongqin, Yuan Guomin, Wu Junli, Ren Shumei, Zhou Dewei
Predictive value of serum progesterone and β-hCG combined with B-ultrasound at 5~8 gestational weeks for prognosis of threatened abortion#br#
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