The Council of Florence, 15th century teaches:
“There are seven sacraments of the new Law: namely, baptism, confirmation, Eucharist, penance, extreme unction, orders, and matrimony…the last two for the government and increase of the entire Church…through orders the Church is truly governed and spiritually propagated; through matrimony corporally increased…Moreover, there is allotted a threefold good on the part of matrimony. First, the progeny is to be accepted and brought up for the worship of God.” (from Denzinger #695 & 702 Sources of Catholic Dogma)
Pope Pius XI Casti Connubii from Denzinger #2226, #2228, & #2229, “To take away the natural and primeval right of marriage, or in any way to circumscribe the chief purpose of marriage established in the beginning by the authority of God, Increase and multiply' [Gen. 1:28], is not within the power of any law of man....Thus the child holds the first place among the blessing of matrimony. Clearly the Creator of the human race Himself, who because of His kindness wished to use men as helpers in propagating life, taught this in Paradise, when He instituted marriage, saying to our first parents, and through them to all spouses: Increase and multiply and fill the earth’ [Gen. 1:28]. This thought St. Augustine very beautifully infers from the words of St. Paul the Apostle to Timothy, when he says: **So the Apostle is witness that marriage is accomplished for the sake of generation.** I wish, he says, young widows to marry. And as if someone said to Him: Why? he immediately adds: To bear children, to be mothers of families'. Indeed, Christian parents should further understand that they are destined not only to propagate and to preserve the human race on earth, nay rather, not to raise any kind of worshipers of the true God, but to** produce offspring** of the Church of Christ; to procreate fellow-citizens of the saints and members of God’s household’ [Eph. 2:19], that the people devoted to the worship of God and our Savior may increase daily.”
I reiterate the teaching of GOD here:
**Genesis 1:28 **
And God blessed them, saying: Increase and multiply, and fill the earth