Introduction: Breast cancer or breast maligna is one of the second high death causes after heart coronary and tend to increase. Purpose of this study is to understand the risk factors of breast cancer in Dr.Kanujoso Djatiwibowo Balikpapan hospital. Methods: This study is quantitaive, analytic study with case control design and used Chi-Square, this study used 48 samples women with breast cancer (1:1) with purposive sampling.  Bivariate analysis using chi-Square test, with OR (Odd Ratio or chance) using 95%confidence level. Results: The results showed a significant relationship between obesity (OR 11.7; p<0.001), hormonal family planning (OR=4.1; p=0.019), history of breastfeeding (OR=0.3; p=0.035) and family history (OR=4.5; p=0.017) with the incidence of breast cancer. Conclusion: obesity is the dominant risk factor where obese women are 11.7 times at risk of breast cancer.

This study aims to determine the effect of providing health education using video on pregnant women's knowledge about hepatitis B. This type of research is a quantitative study with a quasi-experimental research design with a one group pre-post test design. The population in this study were all pregnant women in the working area of ​​the Melak Health Center in 2022 with a total of 227 people. The sampling technique used was purposive sampling with a total sample of 45 people. The data analysis technique used the Wilcoxon test. Based on the research results obtained, it can be concluded that there is an effect of providing health education using video media on pregnant women's knowledge about hepatitis B in the working area of ​​the Melak Health Center (p value 0.000 <0.05).