Over the past 40 years, the Head Start program has delivered early education and support services to 23 million low-income preschool children and their families. In 1995, Head Start expanded to serve children from birth to age 3 and pregnant women through the Early Head Start program. In addition to early education, Head Start programs must provide children and families with access to a range of comprehensive services, including parenting resources, health screenings and follow-up, and social services.