Objective: The aim of this study was to investigate the effects of nutrition Training on mothers' nutrition pattern, breast milk and newborn intestinal microbiota.

Materials and methods: The study was conducted as a non-randomized controlled experimental study. The population of the study consisted of mothers and their babies who delivered vaginally, breastfeeded their babies at the end of the second postnatal day and delivered at the maternity ward of the Malatya Training and Research Hospital Beydağı Campus. The sample of the study consisted of 120 mothers, 57 of whom were experimental and 63 of them were in the control group. In this study, a sub-sample of 15 mothers and their infants was selected and microbiota of breast milk and stool samples were examined.

In the first interview with the mothers in the experimental and control groups, Participant Identification Form, BTSKF were applied as a pre-test and stool samples of breast milk and newborn were taken. Then, the mothers in the experimental group were given nutritional education. In addition, motivational messages were sent to mothers' phones once a week. MTS in the experimental and control groups were filled with BTSKF as an intermediate test at the first month and post-test at the third month and stool samples of breast milk and newborn were collected at the mothers' own homes. During these visits, nutrition counseling was given to the mothers in the experimental group.

Nutrition is very important from intrauterine life to old age for a healthy and productive life. However, the importance of pregnancy, childbirth and breastfeeding during the special stages in which the woman is experienced in her life process increases slightly (Ho et al., 2016; Erick, 2018; Tekiner and Ungan, 2014). Healthy nutrition is a key concern for the health of the baby during pregnancy, childbirth and breastfeeding periods as well as the health of the mother (Taşkın, 2016; Samur, 2008). Intrauterine life is transmitted by placental way and in the postpartum period, breast milk is fed to the baby. Therefore, in order to ensure optimal growth and development of the baby, the mother needs adequate, regular and quality nutrition (Ho et al., 2016; Erick, 2018; Tekiner and Ungan, 2014).

Inclusion Criteria:

• Being literate,
• Being within 48 hours after delivery,
• No disease / complications in mother and newborn,
• Delivery at term (according to the first day of the last menstrual period).

Exclusion Criteria:

• A mother's inability to breastfeed her baby for a variety of reasons, either short or long term (mastitis, abscess).