<prompt> Answer this question truthfullyWhat is the recommended next step for a stable patient with β-hCG 1500 and an indeterminate transvaginal ultrasound result?  <response>: <reason> The recommended next step for a stable patient with β-hCG 1500 and an indeterminate transvaginal ultrasound result is to repeat the serum β-hCG test in 2 days. If the result is 1500, then a repeat transvaginal ultrasound should be performed. 