This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ecotopic Pregnancy, Subject name: Gynaecology & Obstetrics
Suspected ectopic pregnancy is best diagnosed by 
Select and explain. 
A. MRI, B. TVS, C. X-ray abdomen supine, D. HSG
B: TVS
Answer: B: TVS 
Explanation: Ans. B. TVS* Investigation of choice in a case of ectopic pregnancy/suspected case of ectopic pregnancy is Transvaginal scan.* Findings raising suspicion of ectopic on TVS:* Empty uterine cavity: most important* Finding of complex adnexal mass* Fluid (echogenic) in the pouch of Douglas.* Adnexal mass clearly separated from the ovary.* Rarely cardiac motion may be seen in an unruptured tubal ectopic pregnancy.