Comment on

• Prenatal sonographic diagnosis of conjoined twins in the first trimester: two case reports.

  Lam YH, Sin SY, Lam C, Lee CP, Tang MH, Tse HY. Lam YH, et al. Ultrasound Obstet Gynecol. 1998 Apr;11(4):289-91. doi: 10.1046/j.1469-0705.1998.11040289.x. Ultrasound Obstet Gynecol. 1998. PMID: 9618856
• Three-dimensional transvaginal sonography of conjoined twins at 10 weeks: a case report.

  Maymon R, Halperin R, Weinraub Z, Herman A, Schneider D. Maymon R, et al. Ultrasound Obstet Gynecol. 1998 Apr;11(4):292-4. doi: 10.1046/j.1469-0705.1998.11040292.x. Ultrasound Obstet Gynecol. 1998. PMID: 9618857