When does the ego, the reincarnating entity, enter the body of a baby?

It enters at birth but is present during the period of pregnancy, when it remains a conscious entity. During this time attunement takes place and the baby-to-be remains close to the mother-to-be; ‘learning to love’ is one expression used in relation to this attunement. From conception to birth the ego directs the fetus from without, but at the very moment of birth it becomes incarnated within the baby.