234例患者血清β-HCG、P、E2对早期先兆流产安胎结局的影响
234례환자혈청β-HCG、P、E2대조기선조유산안태결국적영향
Effects of Serum β-HCG,P and E2 in 234 Cases of Early Threatened Abortion on Pregnancy Outcome
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