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Gynaecology & Obstetrics General 5c18b98c

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
High-Yield Explanation
Concentration of lecithin relative to sphingomyelin begins to rise at 32 - 34 weeks. L / S ratio < 2 suggests high risk of RDS.
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