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)