What makes delivery much more difficult for the woman?

Question

Quizplus · Accepted Answer

Lying flat on her back can compress major blood vessels, leading to decreased blood flow and oxygen to the baby, and making delivery more difficult. This position is also associated with higher rates of interventions such as forceps or vacuum. Squatting, kneeling, and leaning back on a hammock all allow for gravity to assist in the delivery and can open up the pelvis more, making delivery easier.

What Makes Delivery Much More Difficult for the Woman