What is an oblique fetal lie and how does it affect delivery? An oblique fetal lie is a malpresentation where the fetal axis crosses the uterine axis at an acute angle, with the head and breech located in the iliac regions. This position can complicate labor and delivery, requiring careful planning and intervention. What causes an oblique fetal lie? 🔻 Polyhydramnios (excessive amniotic fluid) 🔻 Multiple pregnancy (twins, triplets, etc.) 🔻 Uterine anomalies or an anatomically narrow pelvis 🔻