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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 weeks pregnant multigravida with preeclampsia presented with fulminant signs. Urgent C-section was planned. Best method for the diagnosis of lung maturity is:
assistant
The correct answer is  Phosphatidylglycerol (PG) is a minor constituent of surfactant. It begins to increase appreciably in amniotic fluid several weeks after the rise in lecithin. Its presence is more indicative of fetal lung maturity because PG enhances the spread of phospholipids on the alveoli. Ref: Mehta S.H., Sokol R.J. (2007). Chapter 13. Methods of Assessment for Pregnancy at Risk. In A.H. DeCherney, L. Nathan (Eds), CURRENT Diagnosis & Treatment Obstetrics & Gynecology, 10e.