TABLE 1

Maternal and Infant Characteristics by Fertility Status: Massachusetts Singleton Births, July 1, 2004, to December 31, 2008

Distribution of Study Sample at Birth, %
ART (n = 6447)Subfertile (n = 5515)Fertile (n = 306 343)
Maternal characteristics
 Age
  <30 years7.811.948.4
  30 to <35 years30.933.730.4
  35 to <40 years40.239.817.6
  40 to <45 years18.113.73.5
  ≥45 years3.00.90.1
 Race/ethnicity
  White non-Hispanic86.185.167.4
  Black non-Hispanic3.03.08.4
  Asian/Pacific Islander6.76.37.5
  Hispanic3.14.414.3
  Other non-Hispanic1.11.22.4
 Marital status
  Married96.194.566.3
  Not married3.95.533.7
 Education
  Less or no HS/GED9.411.937.7
  Some college/associate degree16.518.021.6
  Bachelor/postgraduate74.070.140.7
 Nativity
  Foreign-born17.517.327.6
  US-born82.582.772.4
 Delivery payer source
  Private96.892.158.8
  Public3.27.941.2
 Cigarettes during pregnancy
  No99.298.292.3
  Yes0.81.87.7
 Prenatal care
  Inadequate/intermediate7.48.917.2
  Adequate43.943.545.4
  Adequate plus48.747.637.4
 Parity
  162.439.345.7
  230.040.034.2
  ≥37.620.720.1
 Complications of labor delivery and risk factors
  No27.934.339.1
  Yes72.165.760.9
Infant characteristics
 Gender a
  Male50.950.551.1
  Female49.149.548.9
 Abnormal conditions of newborn
  No68.872.373.7
  Yes31.227.726.3
 Prematurity
  No89.992.293.8
  Yes10.17.86.2
  • N = 318 305 singleton births. HS/GED, high school/general educational development.

  • a P = .69 for ART versus Fertile and 0.33 for Subfertile versus Fertile.