During labor, the CBC, urinalysis and RPR are repeated. The HBSAG is repeated for high-risk patients. A clot of blood is placed on hold.

• 分娩时，全血细胞计数、尿常规和梅毒抗体应重复检测。高危患者应重复检测乙肝表面抗原。静置血观察血凝。