Gynaecology & Obstetrics True about lecithin – sphingomyelin ratio is A Concentration of Lecithin and sphingomyelin before 34 weeks in amniotic fluid is equal B Concentration of Lecithin is more than sphingomyelin in amniotic fluid before 34 weeks. C After 32 to 34 weeks, concentration of sphingomyelin relative to Lecithin begins to rise D There is increased risk of Respiratory distress syndrome if L/S ratio is > 2 💡 Explanation True about lecithin - sphingomyelin ratio is ✓ Correct Answer: A. Concentration of Lecithin and sphingomyelin before 34 weeks in amniotic fluid is equal