Apostle Paul explains how/when Jehovah chooses his anointed ones,
that are part of the ´seed of the woman´ and members of 144 000
and of the New Heavens in his letter to the Christians in the city
of Galatia. In it he writes under Jehovah God´s inspiration that:
´God...separated me from my mother’s womb and called me through
his undeserved kindness´ - Galatians 1:15. So it is really from the
time of conception, that the Creator, Jehovah God reads individual´s
DNA and there he decides if he wants him/her to be part of 144 000.