[en] Background:(1) Maternal-fetal attachment should be assessed in Primary Health Care. Background:(2) Depressive symptoms were negatively related to maternal-fetal attachment. Background:(3) Social support and family functionality had a positive effect on attachment. Background:(4) Greater household crowding had a negative effect on the outcome. Background:(5) It is recommended to screen pregnant women with depression, poor social and family support. to analyze maternal-fetal attachment and interrelated factors in pregnant women assisted in Primary Health Care. a cross-sectional, population-based, analytical epidemiological survey. A sample of 937 participants attended by Family Health Strategy teams was investigated. Maternal-fetal attachment (outcome), sociodemographic and clinical variables, social support, family functionality, depressive symptoms and perceived stress were assessed. Multivariate analysis was adopted using structural equation modeling. maternal-fetal attachment had an average of 92.6 (SD=±15.3). The adjusted structural model showed that the following factors had a direct effect on the outcome: gestational weeks (β=0.29; p<0.001), household crowding (β=-0.07; p=0.027), depressive symptoms (β=-0.11; p=0.003), social support (β=0.08; p<0.001) and family functionality (β=0.19; p<0.001). Indirect effects of social support (β=-0.29; p<0.001) and family functionality (β=-0.20; p<0.001) were identified, mediated by depressive symptoms. a set of interrelationships was identified between maternal-fetal attachment, gestational weeks, household crowding, depressive symptoms, social support and family functionality. It is suggested that the Family Health Strategy offer prenatal care anchored in integrality and humanization, which promotes biopsychosocial well-being during pregnancy and healthy maternal-fetal attachment.

[es] analizar el apego materno-fetal y los factores interrelacionados en gestantes atendidas en la Atención Primaria de Salud. encuesta epidemiológica seccional, de base poblacional y analítica. Se investigó una muestra de 937 participantes atendidas por equipos de la Estrategia de Salud de la Familia. Se evaluaron apego materno-fetal (resultado), variables sociodemográficas y clínicas, apoyo social, funcionalidad familiar, síntomas depresivos y estrés percibido. Se adoptó un análisis multivariado mediante la modelización con ecuaciones estructurales. el apego materno-fetal presentó una media de 92,6 (DE=±15,3). El modelo estructural ajustado evidenció que los siguientes factores ejercieron un efecto directo sobre el resultado: semanas gestacionales (β=0,29; p<0,001), aglomeración del domicilio (β=-0,07; p=0,027), síntomas depresivos (β=-0,11; p=0,003), apoyo social (β=0,08; p<0,001) y funcionalidad familiar (β=0,19; p<0,001). Se identificaron efectos indirectos del apoyo social (β=-0,29; p<0,001) y de la funcionalidad familiar (β=-0,20; p<0,001), mediados por los síntomas depresivos. se identificó un conjunto de interrelaciones entre apego materno-fetal, semanas gestacionales, aglomeración domiciliaria, síntomas depresivos, apoyo social y funcionalidad familiar. Se sugiere que la Estrategia de Salud de la Familia ofrezca una atención prenatal anclada en la integralidad y humanización, que propicie el bienestar biopsicosocial en el embarazo y un apego materno-fetal saludable.