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Critical Issues in the Initial Evaluation and Management of Patients Presenting to the Emergency Department in Early Pregnancy

Official 2016 guideline from the American College of Emergency Physicians.

Recommendations

Diagnosis
Level B
Perform or obtain a pelvic ultrasound for symptomatic pregnant patients with any β-human chorionic gonadotropin (β-hCG) level.
Level B
Do not use the β-human chorionic gonadotropin (β-hCG) value to exclude the diagnosis of ectopic pregnancy in patients who have an indeterminate ultrasound result.
Level C
Obtain specialty consultation or arrange close outpatient follow-up for all patients with an indeterminate pelvic ultrasound result.
Literature