Quiverfull is a movement among evangelical, Protestant, Christian couples, chiefly in the USA, who eagerly accept their children as blessings from God, and eschew birth control, natural family planning and sterilization. Someone of this persuasion might call themselves a "quiver full" or "full quiver" Christian. The term comes from the Bible verses in Psalm 127:3-5:
3 Sons are a heritage from the LORD, children a reward from him.
4 Like arrows in the hands of a warrior are sons born in one's youth.
5 Blessed is the man whose quiver is full of them. They will not be put to shame when they contend with their enemies in the gate. NIV
The key practice of a quiverfull married couple is to not use birth control. A healthy young couple might thereby have a baby every two years or so during their fertile years, yielding as many as 10 children or more. Most quiverfull families are not that large, however, because general health problems or infertility may intervene, or the couple may have married later in life, or the decision to stop using birth control may come later in the marriage.
Most Christians are surprised to learn that such a movement exists, because the secular attitude toward birth control has become so nearly universal in Protestant churches. However, Protestant Christians initially opposed the use of birth control as it was introduced in various forms early in the 20th century. Around 1950, and especially in the 1960s, as birth control became generally accepted in American society, most Christians adopted the secular view that more than one or two children were an expensive burden to a family, and perhaps a contribution to a planetary problem of population growth. This acceptance of birth control was true even among the most conservative evangelicals.
Quiverfull advocates oppose this general acceptance among Protestant Christians of deliberately limiting family size through use of birth control. They consider children to be blessings which should be received happily from God, and not an unaffordable economic burden. The essential idea is that if one child is a blessing, then in an affluent situation each additional child is likewise a blessing, and not something to be disdained as unaffordable.
http://en.wikipedia.org/wiki/Quiverfull