By contrast, God's direction for His people in Scripture is clear. Thus, God expects and will bless families with children. The modern couple who is physically able to have children has no Biblical justification to choose to be childless. Thus, the number of children that a couple has and the timing of their birth is permissible, as long as other Biblical principles are not violated. As seen above, the Biblical emphasis is on large families.
Some circumstances seem to allow for timing of birth.
Successive pregnancies may be too hard on some women with physical problems. Family income may be believed insufficient to provide for many children. Completion of higher education requirements seems a sufficient reason for a short postponement of children. Inherited genetic disease may be a reason not to have children, but medical and spiritual counseling is necessary because this area is quite complicated. However, this control cannot be argued to extend to unmarried women and men.