At what stage, if it exists, does the soul enter the body ?

Covakid says

Re: At what stage, if it exists, does the soul enter the body ?

Catechism of the Catholic Church
http://www.scborromeo.org/ccc.htm

1711 Endowed with a spiritual soul, with intellect and with free will, the human person is from his very conception ordered to God and destined for eternal beatitude. He pursues his perfection in "seeking and loving what is true and good" (GS 15 § 2).


1703 Endowed with "a spiritual and immortal" soul, the human person is "the only creature on earth that God has willed for its own sake." From his conception, he is destined for eternal beatitude.


2322 From its conception, the child has the right to life. Direct abortion, that is, abortion willed as an end or as a means, is a "criminal" practice (GS 27 § 3), gravely contrary to the moral law. The Church imposes the canonical penalty of excommunication for this crime against human life.


2319 Every human life, from the moment of conception until death, is sacred because the human person has been willed for its own sake in the image and likeness of the living and holy God.


2270 Human life must be respected and protected absolutely from the moment of conception. From the first moment of his existence, a human being must be recognized as having the rights of a person - among which is the inviolable right of every innocent being to life.

"" Before I formed you in the womb I knew you, and before you were born I consecrated you. My frame was not hidden from you, when I was being made in secret, intricately wrought in the depths of the earth. ""


2273 The inalienable right to life of every innocent human individual is a constitutive element of a civil society and its legislation:

"The inalienable rights of the person must be recognized and respected by civil society and the political authority. These human rights depend neither on single individuals nor on parents; nor do they represent a concession made by society and the state; they belong to human nature and are inherent in the person by virtue of the creative act from which the person took his origin. Among such fundamental rights one should mention in this regard every human being's right to life and physical integrity from the moment of conception until death."

"The moment a positive law deprives a category of human beings of the protection which civil legislation ought to accord them, the state is denying the equality of all before the law. When the state does not place its power at the service of the rights of each citizen, and in particular of the more vulnerable, the very foundations of a state based on law are undermined. . . . As a consequence of the respect and protection which must be ensured for the unborn child from the moment of conception, the law must provide appropriate penal sanctions for every deliberate violation of the child's rights."