Which two diagnostic tools are used to rule out an ectopic pregnancy?

Which two diagnostic tools are used to rule out an ectopic pregnancy?

• A. beta-hCG and transvaginal ultrasound
• B. CT scan and transvaginal ultrasound
• C. MRI pelvis and beta-hCG
• D. Urine pregnancy test and ultrasound

Answer: (A)

The main idea is that locating a pregnancy requires both confirming that pregnancy exists and identifying its location. A serum quantitative beta-hCG confirms pregnancy and, when interpreted with findings from a transvaginal ultrasound, shows whether there is an intrauterine gestation. Transvaginal ultrasound is the imaging method of choice in early pregnancy because it can visualize the gestational sac inside the uterus earlier and more clearly than an abdominal scan. If an intrauterine gestation is visible, ectopic pregnancy is effectively ruled out for that evaluation. If no intrauterine pregnancy is seen and the beta-hCG level is above the threshold at which an intrauterine sac should be visible (the discriminatory zone), ectopic pregnancy becomes a real concern and warrants urgent follow-up or intervention. CT or MRI aren’t first-line for this scenario, and a urine pregnancy test doesn’t provide the quantitative, location-guiding information that serum beta-hCG does. So the combination of a quantitative beta-hCG and transvaginal ultrasound is the best way to rule out ectopic pregnancy.

The main idea is that locating a pregnancy requires both confirming that pregnancy exists and identifying its location. A serum quantitative beta-hCG confirms pregnancy and, when interpreted with findings from a transvaginal ultrasound, shows whether there is an intrauterine gestation. Transvaginal ultrasound is the imaging method of choice in early pregnancy because it can visualize the gestational sac inside the uterus earlier and more clearly than an abdominal scan. If an intrauterine gestation is visible, ectopic pregnancy is effectively ruled out for that evaluation. If no intrauterine pregnancy is seen and the beta-hCG level is above the threshold at which an intrauterine sac should be visible (the discriminatory zone), ectopic pregnancy becomes a real concern and warrants urgent follow-up or intervention. CT or MRI aren’t first-line for this scenario, and a urine pregnancy test doesn’t provide the quantitative, location-guiding information that serum beta-hCG does. So the combination of a quantitative beta-hCG and transvaginal ultrasound is the best way to rule out ectopic pregnancy.