Lamellar body counts reflect

• A. Surfactant phospholipid packets
• B. Platelet count of the fetus
• C. Platelet count of the mother
• D. Meconium count of the fetus

Answer: (A)

Lamellar bodies are membrane-bound, lipid-rich packets released by fetal lung type II pneumocytes that store surfactant phospholipids, primarily dipalmitoyl phosphatidylcholine (DPPC). Their presence and quantity correlate with the amount of surfactant being produced, so lamellar body counts serve as a marker of fetal lung maturity. Higher counts indicate more mature lungs and a lower risk of neonatal respiratory distress syndrome after birth. This is why the correct interpretation is that lamellar body counts reflect surfactant phospholipid packets. The other options don’t relate to surfactant production or lung maturity, as lamellar bodies are not derived from fetal platelet counts, maternal platelet counts, or meconium.