Children are the supreme gift of marriage and contribute greatly to the good of parents themselves. God himself said, "It is not good that man should be alone," and "from the beginning [he] made them male and female" ; wishing to associate them in a special way in his own creative work, God blessed man and woman with the words: "Be fruitful and multipy." Hence, true married love and the whole structure of family life which results from it, without diminishment of the other ends of marriage, are directed to disposing the spouses to cooperate vailiantly with the love of the Creator and Savior, who through them will increase and enrich his family from day to day.
(Catechism of the Catholic Church #1652.)
