My baby died in womb at 40 weeks + 4 days. No umbrical cord wrapping or placenta seperation. Does cephalo pelvic disproportion cause death.?

Sorry for your loss. Tragically, many fetal deaths after 40 weeks remain unexplained. Cpd means that the baby gets "stuck" after a very prolonged labor. If your baby died before labor started, then it wasn't cpd. If you decide to have another child, give yourself enough time to grieve and heal, and then work closely with a perinatologist (high risk OB specialist) who can do extra specialized testing and monitor well.