The Langkawi Longitudinal Study (LLS) is a prospective cohort study conducted by the Institute for Public Health, MOH, among pregnant women and children in Langkawi, Kedah, starting in March 2025. Pregnant women in the first trimester of pregnancy will be followed up until they give birth. Once the child is born, the infant will be followed up until the child is 2 years old.

This study aims to gather information on factors influencing children's growth in their first 1000 days of life in Malaysia, from conception until they reach two years old. The findings of this study will provide the Ministry of Health Malaysia with crucial information to improve the health of women, pregnant mothers and children in the country.

The Institute for Public Health is conducting this study in collaboration with the Langkawi District Health Department and Hospital Sultanah Maliha, Langkawi. The study participants will consist of 1,000 mother-child pairs receiving antenatal care and child follow-up services at government Maternal and Child Health (MCH) Clinics in Langkawi.

The activities conducted during the survey

Face-to-face interview sessions will be conducted in the MCH clinics by trained data collectors using mobile devices containing the study questionnaire. The duration of the interview session is approximately 30-45 minutes. Besides that, there will be other activities conducted including: