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National Survey of Family Growth

Key Statistics from the National Survey of Family Growth

B Listing

Births (mothers)

Age at first birth

20021 2006-20102 2011-20132
Mean age at first birth for women 15-44 years of age who ever had a liveborn child 22.9 23.0 22.8

Sources:

1NHSR No. 51, Table 7 [PDF - 543 KB]

2Special tabulation by NCHS

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Marital or cohabiting status of mother at time of birth

Percent distribution by marital or cohabiting status of women 15-44 years of age when their first child was born:

20021 2006-20102 2011-20133
Married when first child was born 62.3% 54.4% 48.3%
Cohabiting 12.4% 21.9% 26.4%
Unmarried and not cohabiting 25.3% 23.6% 25.2%

Sources:

1NHSR No. 51, Table 11 [PDF 543 KB]

2Special tabulation by NCHS

Percent distribution by marital or cohabiting status at birth for births in the last 5 years to women 15-44 years of age:

20021 2006-20101 2011-20132
Married when child was born 64.4% 59.7% 56.1%
Cohabiting when child was born 14.3% 23.4% 25.9%
Unmarried and not cohabiting 21.3% 16.9% 18.0%

Sources:

1 NHSR No. 51, Table 12 [PDF - 543 KB]

2Special tabulation by NCHS

Number of children ever born (parity)

Percent distribution of women 40-44 years of age by number of children ever born:

20021 2006-20101 2011-20132
No children 15.0% 15.4% 14.1%
One child 18.0% 15.2% 14.8%
Two children 31.6% 35.0% 35.4%
Three children 20.7% 20.2% 22.0%
Four or more children 14.4% 14.2% 13.7%

Sources:

1NHSR No. 51, Table 3 [PDF - 543 KB]

2Special tabulation by NCHS

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Premarital/nonmarital status of births

20021 2006-20101 2011-20132
Percent of mothers (women 15-44 years of age who ever had a birth) that have ever had a nonmarital birth 42.2% 49.3% 55.3%

Sources:

1NHSR No. 51, Table 13 [PDF - 543 KB]

2Special tabulation by NCHS

Births (fathers)

Age at first birth fathered

20021 2006-20101 2011-20132
Mean age at the birth of their first biological child for men 15-44 years of age who ever fathered a biological child 25.1 25.1 25.4

Sources:

1NHSR No. 51, Table 7 [PDF - 543 KB]

2Special tabulation by NCHS

Marital or cohabiting status of father at time of birth

Marital or cohabiting status of father when his first child was born for men 15-44 years of age (who had ever fathered a child):

20021 2006-20101 2011-20132
Currently or formerly married to child's mother 66.2% 58.6% 57.2%
Cohabiting 18.2% 25.4% 26.4%
Unmarried and not cohabiting 15.6% 16.0% 16.4%

Sources:

1NHSR No. 51, Table 11 [PDF - 543 KB]

2Special tabulation by NCHS

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Number of biological children ever fathered

Percent distribution of men 40-44 years of age by number of children ever fathered:

20021 2006-20102 2011-20133
No children 22.4% 23.6% 19.4%
One child 19.9% 18.2% 20.2%
Two children 25.0% 31.2% 29.1%
Three or more children 32.7% 26.9% 31.3%

Sources:

1Series 23, No 26, Table 4 [PDF - 3.3 MB]

2NHSR No. 51. Table 4 [PDF - 543 KB]

3Special tabulation by NCHS

Birth expectations

20021 2006-20101 2011-20132
Average number of births expected by women 15-44 years of age 2.3 2.3 2.2

Sources:

1NHSR No. 51, Table 5 [PDF -543 KB]

2Special tabulation by NCHS

Percent distribution of women 15-44 years of age by expected number of births in their lifetimes:

20021 2006-20101 2011-20132
Percent of women who expect no births in their lifetime 8.9% 8.3% 9.0%
Percent who expect one birth 13.4% 12.5% 12.6%
Percent who expect 2 births 42.1% 40.9% 40.4%
Percent who expect 3 births 22.1% 24.0% 23.7%
Percent who expect 4 or more births 13.5% 14.3% 14.3%

Sources:

1NHSR No. 51, Table 6 [PDF - 543 KB]

2Special tabulation by NCHS

20021 2006-20101 2011-20132
Average number of children expected by men 15-44 years of age 2.2 2.2 2.1

Sources:

1NHSR No. 51, Table 5 [PDF -543 KB]

2Special tabulation by NCHS

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Breast-feeding

Initiation of breast-feeding

Singleton babies born in 1997-20001 Singleton babies born in 2001 - 20052 Singleton babies born in 2006-20092
Percent who were breast-fed at all 66.8% 68.1% 72.6%

Sources:

1Series 23, No. 25, Table 78 [PDF - 4.7 MB]

2Special tabulation by NCHS

Duration of breast-feeding

Singleton babies born 1997-20001 Singleton babies born 2001-20052 Singleton babies born 2006-20092
Percent who were breast-fed 3 months or more 48.0% 49.8% 50.1%
Percent who were breast-fed 6 months or more 34.9% 37.3% 36.5%
Percent who were breast-fed 12 months or more 17.3% 17.0% 20.0%

Sources:

1Series 23, No. 25, Table 78 [PDF - 4.7 MB]

2Special tabulation by NCHS

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Contact Us:
  • National Survey of Family Growth Staff
    Division of Vital Statistics
    National Center for Health Statistics
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  • NSFG@cdc.gov
  • Page last reviewed: November 6, 2015
  • Page last updated: April 20, 2015
  • Content source: CDC/National Center for Health Statistics
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