<unk>  with foot placements Modern<unk>  (Adjustable) A<unk> , also known as a birth<unk> , is a device that is shaped to assist a woman in the physiological upright posture during childbirth. It is intended to provide balance and support. If backless, it is known as a birth stool. The early<unk> s varied between having three or four legs, though three legged<unk> s are most commonly seen. Both styles support the bottom of the women in labor and often have a slender, sloped back for comfort and to allow<unk>  assistants, who are positioned behind the mother in labor, to massage or support her. Often the arms of the<unk>  have hand holds or arm rests for the mother to grip, providing extra leverage.<unk> s are usually 8 to 10 inches (20.32 centimeters- 25.4 centimeters) off the ground specifically to allow laboring women to brace their feet against the ground to help in pushing.
Birthing chair
Baby cage
Hug machine
Dental dam
Condom machine
Birthing center
Transfer board
Birth attendant