During pregnancy the body undergoes a number of huge changes which affects both your posture and the stability of your joints. This can result in back pain, pelvic pain, painful joints and muscle spasm. In fact up to 50% of pregnant women will experience back or pelvic pain. For many women it is also the first time they will experience "bladder weakness" due to the huge strain on the pelvic floor muscles. Other common difficulties include Carpel tunnel syndrome (pain and numbness in the hands), rib flare pain and rectus muscle separation (seen as doming on the front of your tummy on movement).