Your body will be fragile from the birth, the exhaustion of a newborn, the insanity of taking care of an entirely new human life. (nurturefamilyeducation.com)
The marital union of a man and a woman who have given themselves unreservedly in marriage and who can consummate their union in a beautiful bodily act of conjugal intercourse is the best place to serve as a «home» for new human life, as the «place» where this life can take root and grow in love and service to others. (faith.org.uk)
Genital coition is the only bodily act intrinsically capable of generating new human life. (faith.org.uk)