Modern diagnostic aid to diagnose ectopic pregnancy:: (A) hCG, (B) Transvaginal USG, (C) AFP, (D) Gravindex
Answer is A. When diagnosis is in doubt a serum beta hcg is done .The advent of radioimmunoassay has allowed for very accurate quantification and is able to detect 1 IU /L .(refer pgno:159 sheila 2 nd edition)