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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 28-year-old G1P0 woman is diagnosed as having a twin gestation at 15 weeks gestation. Careful examination of the membranes reveals that there is a very thin membrane between the two fetuses. Which of the following statement is most accurate
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The correct answer is  The ultrasound findings are consistent with monochorionic, diamniotic twins, since there is only a thin membrane between the two gestations. Since a dizygotic gestation always gives rise to a dichorionic diamniotic gestation, this patient must have a monozygotic pregnancy which split at 4 to 8 days after feilization. A monozygotic pregnancy is at greater risk for IUGR, stillbih.