The goal of this Randomized Controlled Trial is to compare the health condition of pregnant women through pregnancy monitoring in the implementation of pregnancy class. The main question it aims to answer are:

How is the condition of the mother and baby after pregnancy monitoring using the REST mobile application (Risk identification, Evaluation counseling, Systematic monitoring, Trobleshooting)

Participants will be monitored for the condition of their pregnancy from 20 weeks of pregnancy until delivery. Participants will attend in the pregnancy class as many as 3 meetings and a pregnancy check-up by the midwife.

Researchers will compare intervention group to see if normal delivery methods, birth weight of the baby (>2500), antenatal care visits (>6 times), and prevention of pregnancy complications were better than the control group.

The research will involve pregnant women and midwives. The midwife will conduct a pregnancy check-up which includes 10 pregnancy checks (height and weight, blood pressure, upper arm circumference, uterine fundus height, Tetanus immunization, Fe tablets, fetal presentation and fetal heart rate, counseling, laboratory tests, case handling). The examination is carried out every class meeting of pregnant women. The results of the examination will be inputted into the mobile application. Pregnant women will fill in the mobile application if the mother does antenatal care at a health facility. This activity will last until the mother's delivery.

Inclusion Criteria:

• Pregnant women with a gestational age of 20-22 weeks.
• Pregnant women who have a pregnancy check-up at a health facility
• Plan to settle in the research area for at least the next 2 years
• Willing to participate in the research by signing an informed consent form.

Exclusion Criteria:

• Suffering from chronic diseases that require special pregnancy care
• It is certain that it cannot give birth normally
• Unable to operate an android phone