Gynaecology & Obstetrics Fetus Placenta & Fetal Membrane ad5ad5f5 What is the pH of amniotic fluid? A 6.5-7 B 7.1-7.3 C 7.4-7.8 D 7.8-8.1 High-Yield Explanation Ans. B. 7.1-7.3Properties of amniotic fluid:a. pH:7.1-7.3b. Specific gravity: 1.010c. Osmolarity: 250mOsmol/l--a sign of fetal maturity.