Breast milk is the best choice food for a baby’s growth and development of infants at some point of the primary 6 months of life. Fulfillment of nutrition during breastfeeding is an important requirement, one of which is the intake of the amino acid leucine which is said to affect prolactin as a regulator of breast milk production and protein synthesis in breast milk. This can support the quality and quantity of breast milk to meet the nutritional needs of infants support infant growth and development and reduce the incidence of stunting at the age of toddlers. This research aims to determine the relationship between leucine intake and levels of prolactin and protein in breast milk in breastfeeding mothers. This research is an analytic observational study with a cross-sectional method. This study carried out normality using the Kolmogorov-Smirnov test and using the Pearson correlation test to determine the relationship between variables. Based on the test results of the relationship between leucine intake and serum prolactin levels, a significance value of 0.005 (p<0.05) was obtained with a correlation coefficient value of 0.183 and the relationship between leucine intake and breast milk protein levels obtained a significance value of 0.033 (p<0.05) with a correlation coefficient of 0.147. The results of this test showed a significant relationship between these variables. There is a weak correlation between leucine intake and levels of prolactin and protein in breast milk

Mother's milk is considered the optimal substance for newborns because it provides complete nutrition, improves infant health, and increases immunity and low incidence of gastrointestinal disease. The development of the alveolar-lobular glands in the breast for the initiation of breastfeeding is the role of the prolactin hormone. Genistein is a type of isoflavonoid whose content is abundant in soybeans, and their processed products (tempeh and tofu) play a role in the synthesis of serum prolactin. Body Mass Index (BMI) indicates maternal nutritional status, which can also affect serum prolactin. This study will discuss the relationship between genistein intake and BMI on serum prolactin levels of nursing mothers. This research uses analytical observational research on 110 breastfeeding mothers in the Benowo and Kenjeran Health Center Work Areas, Surabaya. The results of Spearman's correlation test showed that there was a significant relationship between genistein intake on maternal serum prolactin levels (p=0.001) and BMI on maternal serum prolactin levels (p=0.036) (Pearson's test). The estrogenic properties of genistein are very similar to endogenous estrogens, which are thought to increase the formation of maternal serum prolactin levels and its activity which stimulated ductal elongation in mammary gland development. The increase in BMI levels in the body is go with an increase in serum prolactin levels due to the lack of availability of dopamine two receptor (D2R) sites in the body of nursing mothers. Keywords: Genistein intake Body Mass Index, Serum Prolactin Levels Exclusive breastfeeding Nutrition of breastfeeding mothers

Spontaneous vaginal deliveries allows perineal lacerations. The level of resistance of a person to perineal lacerations varies widely. The risk of developing postpartum depression is experienced by different groups of women. In the early months after delivery, depression is the most common morbidity in postpartum women. The presence of perineal lacerations can be a factor in the development of postpartum depression. Stress and anxiety disorders can be caused by the occurrence of grade 3 and 4 perineal lacerations. This study looked at the potential effect of perineal laceration on the incidence of postpartum depression in women with vaginal delivery. This systematic review used study research that related to postpartum depression and perineal lacerations. Articles that are relevant are searched for by the author on Google Scholar, ScienceDirect, and Pubmed from the last 5 years (2015-2020). By 5 of the 77 studies were discussed in the review. The studies were conducted in United States, Taiwan, France, Brazil, and Sweden, total 4.966 women were included. Three of five studies showing that the presence of perineal lacerations increases the incidence of postpartum depression but along with the development, two research from the last 2 years, perineal lacerations did not increase risk of postpartum depression. However, severe perineal lacerations increase risk of postpartum depression among women with low resilience with 3rd- 4th degree of perineal laceration support development of postnatal depression in women. Keywords: perineal, lacerations, depression, postpartum.