['To identify early ultrasound markers in pregnant patients that predict a favorable pregnancy outcome.', 'Retrospective case-control study.', 'Infertility patients in fertility clinic.', '1051 women with early pregnancies conceived after fertility treatment.', 'None.', "Ongoing pregnancy >20 weeks' gestation.", '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.'] Are triple ultrasound markers including fetal cardiac activity related to miscarriage risk?