With religion's prohibition against abortion, I wondered if religious people might be more likely to have children and not be married. Using GSS data, I looked at white households with minor-age children. Here is the breakdown of marital status by church attendance (sample size = 611):
Never Married 16.8
Never Married 7.1
Religious people with kids at home are more likely to be married, and are less likely to be separated, divorced, or never-married. All comparisons are significantly different except for the widowed category.