The goal of this quasi-experimental interventional study is to learn whether an online-based Health Behavior Mother intervention during the first 1000 days of life can improve maternal care behavior in third-trimester pregnant women in the working area of the Pematang Jaya Community Health Center, Langkat Regency, Indonesia. The main questions it aims to answer are: * Does the online Health Behavior Mother intervention improve maternal knowledge regarding prenatal, intranatal, and postnatal care during the first 1000 days of life? * Does the online Health Behavior Mother intervention improve maternal attitudes regarding prenatal, intranatal, and postnatal care during the first 1000 days of life? * Does the online Health Behavior Mother intervention improve maternal practices regarding prenatal, intranatal, and postnatal care during the first 1000 days of life? Participants will be third-trimester pregnant women who live in the working area of the Pematang Jaya Community Health Center and agree to participate in the study. Participants will: * Complete a pre-test questionnaire measuring maternal knowledge, attitudes, and practices regarding care during the first 1000 days of life. * Receive eight sessions of online health education related to prenatal care, childbirth preparation, and postnatal care. * Participate in online discussions and monitoring through digital communication platforms. * Complete a post-test questionnaire to evaluate changes in knowledge, attitudes, and practices after the intervention. The intervention includes educational materials on: * Prenatal care (ANC visits, high-risk screening, maternal and fetal nutrition, psychological preparation for childbirth) * Intranatal care (pain management, early breastfeeding initiation, emergency management) * Postnatal care (maternal health, lactation counseling, family planning, and newborn care)
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Change from Baseline in Maternal Knowledge, Attitudes, and Practices on Prenatal, Intranatal, and Postnatal Care
Timeframe: From enrollment (third trimester of pregnancy) to 1 month postpartum, during which 8 online counseling sessions were delivered and monitored.