Table 1.

Inclusion and exclusion criteria.

Inclusion Criteria	Exclusion Criteria
Informed consent to participate in the study	Lack of informed consent to participate in the study
Vaginal delivery	Assisted vaginal delivery
Surgical delivery	Active mother’s infection
Adequate colostrum lactation for the collection of samples	Breast infection/inflammations
Single pregnancy	Chronic antibiotic therapy
	Autoimmune diseases
	Gestational diabetes
	HELLP * syndrome
	Preeclampsia and eclampsia
	Multiple pregnancy
	Smoking

* HELLP (Hemolysis, Elevated Liver enzymes, Low Platelet count).