Ongoing longitudinal birth cohort established at Mok-dong Hospital, Ewha Woman's University, Seoul, South Korea, between 2001 and 2006.

Cohort composed of mothers, who visited to prenatal care between 24 and 28 weeks of gestation, between 2001 and 2006. After the child was born then, we collected information at birth outcome and conducted mail surveys at 6, 12, 18, and 24 months. Regular check-up was conducted at 3, 5, and every year after 7 years of age(last check up point: 15 years old). In check-up survey, after an 8-hour overnight fast, blood and urine samples (3 ml EDTA-blood and 5 ml serum) were obtained from subjects by venepuncture. following parameters were checked: physical growth, blood pressure. metabolic biomarker(Total cholesterol, HDl-cholesterol, TG(triglyceride), glucose, uric acid, etc.), K-CBCL(Korea-child behavior checklist), 24 hour recall method for nutrition, FFQ(Food Frequency Questionnaire), Questionnaires including Socio-economic status and physical activity.

Inclusion Criteria:

• Participants' mothers, who visited to prenatal care between 24 and 28 weeks of gestation.
• An individual who can be followed up during the study period and is capable of complying with the study requirements

Exclusion Criteria:

• An individual thought to have difficulty participating in the study due to other reasons, based on the judgment of the investigator

Healthy infants and Participants' mothers