Final answer:
A transverse lie during pregnancy can prevent a spontaneous delivery and may require medical intervention for safe delivery.
Step-by-step explanation:
A transverse lie during pregnancy occurs when the fetus is positioned horizontally across the uterus, rather than in a head-down or head-up position.
This position can prevent a spontaneous delivery because the baby cannot pass through the birth canal in this alignment. It may require medical intervention, such as a cesarean section, to safely deliver the baby.
During a transverse lie, the contractions of the uterus may not be effective in pushing the baby out. Additionally, the umbilical cord may become compressed, cutting off the baby's oxygen supply.
These complications highlight why a transverse lie is a hindrance to a spontaneous delivery.