Knowledge of the reproductive system and organs greatly affects the health of adolescent girls. Adolescence is also called puberty. Preconception is the time when the egg unites with the sperm, which occurs in women before pregnancy. Methods: This study is a non-experimental study that applies a quantitative approach, where the information collected is in the form of numbers. It implements a descriptive analytic design with a cross-sectional correlational method. Data was collected by filling out a questionnaire. The number of respondents was 107 people who were taken by purposive sampling technique. The data obtained were then statistically analyzed using Somers'd Correlation. Results: The results obtained from the analysis showed that of the 107 respondents, most had characteristics of 17 years of age as much as 72.9%. The results also showed that 82.2% of respondents experienced good reproductive health knowledge and 3.7% of respondents experienced poor reproductive health knowledge. A total of 51.4% of respondents had good preconception management and 2.8% of respondents had poor preconception management. Conclusion: In this conclusion states that, there is a relationship between the knowledge of adolescent girls about reproductive health and preconception management with a value (p value = 0.001 <0.05) and the value of r (correlation) is 0.627 which indicates that the value of a strong correlation means, the better the reproductive health knowledge, the better the preconception management value.

Mother's Milk (breast milk) exclusive breastfeeding was only in babies starting at the age of 0 to 6 months.  When mothers don't know how to manage their lactation, it can stop them from breastfeeding their babies properly.  The goal of this study is to find out what happens when people learn how to breastfeed and how that changes the practice of exclusively breastfeeding in first-time moms.  The quasi-approach and experimental pre-post strategy are used in this study.  Mothers who had their first child at the Bangetayu health center made up the sample, which was made up of 50 people chosen at random from the whole population.  Questionnaires filled out before and after the activity were used to collect data.  The 50 people who filled out the Wilcoxon test showed that mothers' knowledge, attitudes, and skills were different before and after education. The p value of 0.001 (p value <0.05) means that mothers' knowledge, attitudes, and skills on exclusive breastfeeding were different before and after education.  Lactation instruction had an effect on the practice of nursing exclusively for the first six months after giving birth.

Menstruation is a sign that a woman has a uterus in her stomach, so menstruation is normal for all women. Sharia-based menstruation has differences in terms of cleansing (hygiene), counting the menstrual blood that comes out, prohibitions, and what is permitted during menstruation. This research is quantitative research, using Pre-Experimental Design with a Two Group Pretest-Posttest design. Sampling used a stratified random sampling technique, the number of respondents was 64 female students using the paired t-test. The results of the respondent analysis weare obtained from 32 respondents at SMA 3 Sultan Agung, on average there were 25 female students aged 17 years with a percentage of (78.1%). And it is known that of the 32 respondents at SMA 1 Sultan Agung, the average number of 17 year old female students was 22 respondents with a percentage of (66.7%). And the test results show that the level of knowledge of SMA 3 Sultan Agung female students increased significantly after receiving the intervention from (30.46%) to (86.87%). However, this is different from SMA 1 Sultan Agung, where there are only slight changes because there is no intervention. There is an influence of Sharia-based menstrual education on adolescent behavior during menstruation in high school with a p-value of 0.001 (p-value < 0.05)