"Natalism"

The first three paragraphs of The New Red-Diaper Babies (NY Times reg. req'.d):

There is a little-known movement sweeping across the United States. The movement is "natalism."

All across the industrialized world, birthrates are falling - in Western Europe, in Canada and in many regions of the United States. People are marrying later and having fewer kids. But spread around this country, and concentrated in certain areas, the natalists defy these trends.

They are having three, four or more kids. Their personal identity is defined by parenthood. They are more spiritually, emotionally and physically invested in their homes than in any other sphere of life, having concluded that parenthood is the most enriching and elevating thing they can do. Very often they have sacrificed pleasures like sophisticated movies, restaurant dining and foreign travel, let alone competitive careers and disposable income, for the sake of their parental calling.

This trend is occuring in red states, while blue states continue to have falling birth rates. Natalists are not your classic Republican voters, however:

Politicians will try to pander to this group. They should know this is a spiritual movement, not a political one. The people who are having big families are explicitly rejecting materialistic incentives and hyperindividualism. It costs a middle-class family upward of $200,000 to raise a child. These people are saying money and ambition will not be their gods.

Natalists resist the declining fertility trends not because of income, education or other socioeconomic characteristics. It's attitudes. People with larger families tend to attend religious services more often, and tend to have more traditional gender roles.