Young First-Time Mothers Less Likely to be Married

"The percentage of young first-time mothers who are married is dropping, according to Fertility of Women in the United States: 2012, a report released today by the U.S. Census Bureau.
In the early 1990s, at least half of all first births to mothers younger than age 23 occurred in marriage. Since 2005, more young mothers were cohabiting (38 percent) than were married (24 percent) at the time of their first birth. However, the majority of all women continue to have their first child within marriage.
Fertility of Women in the United States: 2012 uses data from the 2012 American Community Survey and the 2012 Current Population Survey. The report examines women's marital status at the time of their first births, the completed fertility of women up to age 50 and the fertility patterns of young women. Fertility patterns are shown by race, ethnicity, age, citizenship and employment status, as well as state of residence..."
Fertility, First time mothers

Custodial Mothers and Fathers and Their Child Support: 2009

"This report focuses on the child support income that custodial parents reported
receiving from noncustodial parents living elsewhere, and other types of support,
such as health insurance and noncash assistance. The most recent data in this report are from the Child Support Supplement to the April 2010 Current Population Survey (CPS). It provides demographic information about custodial parents as of 2010, as well as child support and other income or program data for the 2009 calendar year.."

Maternity Leave and Employment Patterns of First-Time Mothers: 1961-2008

"Fifty-one percent of working women who had their first birth between 2006 and 2008 received paid leave (i.e. maternity leave, sick leave, vacation) compared with 42 percent between 1996 and 2000, according to a report released today by the U.S. Census Bureau.

This finding comes from Maternity Leave and Employment Patterns of First-Time Mothers: 1961-2008 [PDF], a report that analyzes trends in women's work experience before their first child, identifies their maternity leave arrangements before and after the birth and examines how rapidly they returned to work..."