Evidence from clinical trials and biomechanical studies indicates that squatting and upright birthing positions expand the pelvic outlet, shorten the second stage of labor, and reduce certain birth complications such as instrumental deliveries and episiotomies.
The retrieved papers consistently show that adopting a squatting or upright position during the second stage of labor provides mechanical advantages (expanding the pelvic outlet) and clinical benefits, such as reduced labor duration and fewer assisted deliveries or episiotomies. While some studies note potential trade-offs like increased blood loss or minor perineal tears, the overall consensus across multiple systematic reviews and trials supports the claim that squatting positions reduce certain birth complications.