Although within the man millions of living sperm come and go , the destination of everyone is known by the Paramatma, by Divinity, and thus when it becomes the right time the destined souls are placed and ready to be injected, the consciousness of the man and women and varieties of karmic calculations are made. The soul will share the genes and subtle energies of the mother and father . These inconceivably complex arrangements are easily understood in the modern world of Ai and algorithms.
Does your computer know you and not what you want of need .?
Take that concept to the realms of the higher planes of intelligence who have given the Dna coding or the perfect gravitational forces on each plant and the perfect cocktail of gasses to breath .
AC Bhaktivedanta Swami says .
Everything is done by the supervision of the Supreme Personality of Godhead. Material nature supplies the body, but it does so under the direction of the Supersoul. It is said in Bhagavad-gītā that a living entity is wandering in this material world on a chariot made by material nature. The Supreme Lord, as Supersoul, is always present with the individual soul. He directs material nature to supply a particular type of body to the individual soul according to the result of his work, and the material nature supplies it. Here one word, retaḥ-kaṇāśrayaḥ, is very significant because it indicates that it is not the semen of the man that creates life within the womb of a woman; rather, the living entity, the soul, takes shelter in a particle of semen and is then pushed into the womb of a woman. Then the body develops. There is no possibility of creating a living entity without the presence of the soul simply by sexual intercourse. The materialistic theory that there is no soul and that a child is born simply by material combination of the sperm and ovum is not very feasible. It is unacceptable.