In simple words: The baby is too large to be delivered through the vagina.

Labor is obstructed because the fetus is too large to pass through the mother's birth canal.

Example 1: A pregnant woman in labor experiences prolonged and difficult labor with no descent of the fetus despite strong contractions. Imaging studies indicate that the fetus is significantly larger than average and disproportionate to the mother's pelvis. This indicates obstructed labor due to an unusually large fetus., A woman with gestational diabetes develops macrosomia (large fetus). Upon going into labor, she reaches full cervical dilation, but the baby does not descend. After assessment, the medical team determines that the baby's head is too large to fit through her pelvic opening, constituting obstructed labor., During labor, a woman's cervix stops dilating, and the fetal head does not descend despite adequate contractions. An ultrasound reveals that the baby is in a normal position, but its size is large for the gestational age and the maternal pelvis appears small.The diagnosis of obstructed labor due to an unusually large fetus is made.

Documentation should include details of the mother's labor progress (cervical dilation, fetal descent, strength and frequency of contractions), imaging studies (ultrasound, X-ray) confirming the large fetal size, and any associated conditions (e.g., gestational diabetes). Records must also include the chosen method of delivery (e.g., cesarean section) and its justification.