The midwives should not position women in the lithotomy/supine position because when a woman is placed in this position, there may be reduced blood flow to the uterus, and this interferes with the progress of the second stage of labour.
Can I give birth squatting in a hospital?
Speak with a healthcare professional if you wish to birth in the squatting position. Some hospitals may have policies about birthing in bed or other guidelines you'll need to follow. Others may be fine with this position, but it's a good idea to get on the same page before the big day arrives.
Is giving birth squatting better?
Preparation. Squatting is beneficial because it tilts the uterus and pelvis forward, placing the baby in proper alignment for delivery. Squatting also encourages and strengthens the intensity of contractions, and can also relieve pressure in the back.