At death our chakras, which have acted as tape recorders of all our thoughts and actions from past lives, hold a karmic blueprint of how we are likely to be in the next physical incarnation. After conception the first development in the reincarnating child is the brain and spine As the electrical karmically bound astral body enters the womb at conception. so the DNA and karmically guided life force work together to mould the babies form. The physical body is directly sustained and guided by the life currents of the astral body. There is no judgment, only a measure for measure strengthening or weakening of intelligence or health based on the effects of the habituated sum of all our past thoughts and actions.