This is a condition where there is too little amniotic fluid around the fetus. This increases the risk of umbilical cord prolapse because the cord can easily slip past the presenting part of the fetus and into the cervix or vagina.

This can cause fetal hypoxia and distress due to compression or occlusion of the cord.

Choice A. Transverse lie is wrong because this is a condition where the fetus lies horizontally across the uterus. This can increase the risk of cord prolapse if the membranes rupture and the cord descends alongside or before the fetus.

Choice B. Macrosomia is wrong because this is a condition where the fetus is larger than average. This can decrease the risk of cord prolapse because the presenting part of the fetus is more likely to fill the pelvis and prevent the cord from slipping past.

Choice D. Placenta previa is wrong because this is a condition where the placenta covers part or all of the cervix. This can increase the risk of bleeding during labor, but not necessarily cord prolapse.