it is my understanding that the soul/spirit can enter the fetus at any time, but usually waits until about the 4th month, altho even then they can come and go at will....they already know if they will be miscarried or aborted, so they may or may not enter the fetus....It probably depends if they are meant to form a bond with the Mother or not...... If the Mother felt a bond with the child, then that soul had most likely entered the fetus and this was preplanned from the Otherside as somr sort of lesson or experience for the Mother....... fondest regards, Juanita