First 1,000 Days of Life

The first 1,000 days extend from conception to a child’s second birthday, roughly covering pregnancy and the first two years after birth. They constitute a critical window of opportunity because the brain and body develop rapidly, while nutritional deprivation, disease and inadequate care during this period can have long-lasting consequences.

Foundation for physical and cognitive development

Pregnancy and infancy involve rapid growth of the brain, organs and body tissues. Adequate nutrition and responsive care during this period support healthy growth, learning capacity and psychosocial development.

• Maternal health and nutrition influence fetal growth and the child’s birth outcomes.
• Early nutrition supports brain development, including processes underlying language, memory and emotional regulation.
• Good nutrition and healthcare strengthen physical growth and reduce vulnerability to infection.
• The interaction of nutrition, health, safety and responsive caregiving shapes the child’s developmental potential.

Why deprivation has lasting effects

Nutritional deficits and repeated infections can reinforce each other during this sensitive period. Growth and developmental losses arising early in life may be difficult to reverse fully after the window has passed.

• Poor maternal nutrition and inadequate antenatal care can increase the risk of adverse pregnancy and birth outcomes.
• Inadequate feeding and recurrent illness can contribute to stunting, wasting and micronutrient deficiencies.
• Early undernutrition is associated with poorer cognitive development, schooling outcomes and adult productivity.
• Conditions in early life can influence later susceptibility to non-communicable diseases, although outcomes are not biologically predetermined.

What protection during the window requires

The first 1,000 days require a continuum of care linking maternal services with infant nutrition, healthcare and early stimulation.

• Women need adequate diets, micronutrient support and regular antenatal care during pregnancy.
• Early initiation and exclusive breastfeeding for six months provide nutrition and protection against infections.
• Appropriate complementary feeding should begin at six months, alongside continued breastfeeding up to two years or beyond.
• Immunisation, growth monitoring, sanitation, timely treatment of illness and responsive caregiving complement nutrition-specific measures.
• Anganwadi and public-health services help deliver counselling, supplementary nutrition, health referrals and early childhood care.