Gynaecology & Obstetrics After 20 weeks of gestation main contribution of amniotic fluid is by: A Fetal urine B Maternal serum filtered through placenta C Transudate of fetal plasma through fetal skin D Transudate across umbilical cord 💡 Explanation After 20 weeks of gestation main contribution of amniotic fluid is by: ✓ Correct Answer: A. Fetal urine