Maternal support to become mother: is an intervention based on the mid-range nursing theory of Ramona Mercer, whose purpose is to empower first-time mothers in their new maternal role, favoring the mother-child bond, strengthening social support and maternal self-efficacy, consists of:

1. Four Home visits , in the first week; first month of baby life; at three months; and the fourth postpartum month.
2. Four Educational sessions and support sessions for maternal empowerment in each home visit.
3. Telephone follow-up: at 15 days; a month and a half; at two and a half months; and three and a half months postpartum.

The participants will receive the usual education about the care of the mother during the puerperium, the care of the newborn, including breastfeeding.

"AMACOM-PRI": Apoyo Materno para Convertirse en Madre - Primerizas. Maternal support to become first-time mothers is an intervention based on the mid-range nursing theory of Ramona Mercer, whose purpose is to empower first-time mothers in their new maternal role, favoring the mother-child bond, strengthening social support and maternal self-efficacy, consists of.

1. Four Home visits , in the first week; first month of baby life; at three months; and the fourth postpartum month.
2. Four Educational sessions and support sessions for maternal empowerment in each home visit.
3. Telephone follow-up: at 15 days; a month and a half; at two and a half months; and three and a half months postpartum.

Construct: This scale measures the process of maternal role adoption or "becoming mother" process; such process and this scale was created based in Ramona Mercer's theory. Conformation: It consists of 56 items distributed in 10 dimensions: 1)Interaction with the couple with respect to the baby, 2)baby acceptance, 3 Contact with the role of mother, 4)Stimulation of the baby, 5)Interaction with the family of origin regarding to the baby, 6 Baby care, 7)Maternal expressions of affection for the baby, 8)Well-being of the baby, 9)Concern and protection of the baby, 10)Knowledge and culture related to the baby. Scale Scores and Ranges: The instrument has a Likert scale (from 1 to 4). 1 = totally disagree and 4 = total agreement. The score are from 56 to 224. The classification score ranges are: low 56-180 points, medium 181-202 and high 203-224 points. The higher score across the scale indicate better adoption of the maternal role. The outcome of this scale is the sum of each linker-item.

_this scale measures Perceived Maternal Parenting Self-Efficacy.Conformation: This instrument was created by two psychologists from the University of Wolverhampton, Ireland. It has validity and reliability studies in Ireland and Brazil. It consists of 20 items distributed in 4 dimensions_ 1. Care tasks, 2. Behaviors raised, 3. Reading of behaviors or signals, 4. Situational beliefs. Scale Scores and Ranges_ the instrument has a Likert scale that goes from 1 to 4. There are 1 in totally disagree and 4 in total agreement. The instrument has a minimum score of 20 and a maximum score of 80. The higher the scores indicate greater (better) self-efficacy_

Conformation: This instrument was created by a nurse from the University of College Cork, Ireland. It has validity and reliability tests in Ireland. Consisting of two subscales, the Structural Social Support subscale measures structural social support and the Functional Social Support subscale that measures functional social support. The latter is the one that is consistent with Ramona Mercer's nursing theory. The subscale Functional Social Support consists of 16 items distributed in 4 dimensions: 1) Informative Support, 2) Instrumental Support (Physical), 3) Emotional Support, 4)Valuation Support. Dimensions: Informative support (Minimum score of 7, maximum score of 28). Instrumental support (score range 7-28). Emotional support (score range 4- 16). Valuation support (score range from 4-16). The instrument has a Likert scale from 1 to 4; 1 for totally disagree and 4 for total agreement. Score range: 22-88. As higher the score, greater (better) Structural Social Support.

This instrument in its original English version was created by the psychologist Stephen Matthey and subsequently, based on this scale, with prior authorization, the nurses Dr. Vesga and Dr. Durán validated the Spanish scale. It is a self-report scale of 13 items. Cut point recommended is 9, which allows the classification of mothers according to the score obtained: greater than 9 is a risk of stress due to the maternal role and less than 9 is without risk of stress due to the maternal role.