Knowing your pain-free range of movement is important if you want to experience a natural childbirth without aggravating your SPD.
How do I calculate my pain-free range of movement?
Lie on your back and open your legs slowly until you feel pain. Once you feel pain, close them back slowly until you don’t feel pain anymore. Then have your partner or midwife measure the distance between your knees.
What do I do with my pain-free range of movement?
Write down what your pain-free range of movement is and record it in your birth plan. During labour never open your legs wider than that distance. If you take an epidural you will need to have someone constantly keeping track of the space between your legs, because you won’t be able to feel pain if there’s any.