Average weigth of fetal lung after respiration is

Foder's test The weight of the respired lung will be twice the weight of unrespired lung. This is due to the increased blood flow to the lung. This is not a conclusive evidence of establishment of respiration. Average weight of fetal lung is 30-40gm before establishment of respiration and will become 60-70gm after respiration. Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 348