Triple ultrasound markers including fetal cardiac activity are related to miscarriage risk

ObjectiveTo identify early ultrasound markers in pregnant patients that predict a favorable pregnancy outcome.DesignRetrospective case-control study.SettingInfertility patients in fertility clinic.Patient(s)1051 women with early pregnancies conceived after fertility treatment.Intervention(s)None.Main Outcome Measure(s)Ongoing pregnancy >20 weeks’ gestation.Result(s)Ongoing pregnancy rate was 90.5% for those pregnancies having early fetal cardiac activity (odds ratio [OR] = 66.5). Gestational sac diameter ≥12 mm was associated with ongoing pregnancy rate of 91.9%. Small gestational sac diameter, <8 mm, was associated with high miscarriage rate, 85.3%. Ongoing pregnancy rates for yolk sac diameter <2 mm, 2–6 mm, and >6 mm were 20%, 89.2%, and 20%, respectively (OR = 33.1, 2–6 vs <2 mm; OR = 33.1, 2–6 vs >6 mm). Ongoing pregnancy rate was 94% when all three markers were present.Conclusion(s)On postconception days 33–36, gestational sac diameter ≥12 mm, yolk sac diameter 2–6 mm, and the presence of fetal cardiac activity were favorable markers.