1. During pregnancy: with a workshop where there will be particularly designed to solve doubts about the problems of breastfeeding, and for showing the health benefits for the infant and mother health. The workshop will be based mainly on the material developed in the FC and with the assistance of an International Board Certified Lactation Consultant (IBCLC) of Mexico. It will ensure to cover the educational material, communication and practical, recommended by the WHO Baby Friendly Hospital Initiative. For this group, there will be asked another self-efficacy questionnaire at the end of the workshop.