Foetal macrosomia is a rising challenge in present obstetrics. It is more common in the infant of the diabetic mother, but it occur in non- diabetic pregnancies. In modern obstetrics, fetal macrosomia is a major contributor to obstetric morbidity. Increasing birth weight is known to predispose to a more difficult delivery and increasing rates of caesarean delivery. Women with a history of one macrosomic infantare at significantly increased risk of another macrosomic infant in a subsequent pregnancy. We reported a rare case of primigravida, 39 weeks pog with breech in labour with big baby without any association of diabetes or hypothyroidism. By clinical examination baby was big and there was fetopelvic disproportion. She was planned for emergency caesarean section. She delivered a single live male, 6.1kg baby by emergency lower segment caesarean section.