Comment on

• Diagnosis of early ectopic pregnancy by measurement of the maternal serum to cul-de-sac fluid beta-hCG ratio.

  Hinney B, Bertagnoli C, Tobler-Sommer M, Osmers R, Wuttke W, Kuhn W. Hinney B, et al. Ultrasound Obstet Gynecol. 1995 Apr;5(4):260-6. doi: 10.1046/j.1469-0705.1995.05040260.x. Ultrasound Obstet Gynecol. 1995. PMID: 7541302
• Transvaginal sonography and serum hCG in monitoring of presumed ectopic pregnancies selected for expectant management.

  Cacciatore B, Korhonen J, Stenman UH, Ylöstalo P. Cacciatore B, et al. Ultrasound Obstet Gynecol. 1995 May;5(5):297-300. doi: 10.1046/j.1469-0705.1995.05050297.x. Ultrasound Obstet Gynecol. 1995. PMID: 7614131