The difference can make a woman's labor pattern vary. (spinningbabies.com)
This makes it harder to provide care that is specific to your unique labor pattern. (mindbodygreen.com)
It has been shown to be safe in labor (it has been used in the UK for decades), has not been shown to affect labor patterns, impact the strength of contractions, or caused depressed respirations (breathing problems) in babies after birth. (thewifeys.com)