[Recurring genital bleeding in an extreme premature infant]. / Sangrado genital recurrente en una lactante prematura extrema.

Mini-puberty refers to the transient activation of the hypothalamic-pituitary-gonadal axis during the first months of life. This activation in preterm infants could be more exaggerated and prolonged. Ob jective: To present a case of exaggerated mini-puberty in an extremely preterm infant, with recurrent genital bleeding. Clinical Case: A 25-week preterm newborn presented at 5 months old with breast buds, areolar pigmentation, and estrogenic effects on the vaginal mucosa, with recurrent genital blee ding in three consecutive months. Her laboratory evaluation showed elevated values of luteinizing hormone (LH), follicle-stimulating hormone (FSH), and estradiol (E2). An exaggerated mini-puber ty due to extreme prematurity was suspected, therefore a conservative approach was taken. During follow-up, the patient showed partial regression of breast buds and cessation of genital bleeding, and decreasing levels of gonadotropin and estradiol. Conclusion: Mini-puberty in preterm newborns can present exaggeratedly, simulating precocious puberty and even presenting, exceptionally, recurrent genital bleeding. Considering the increasing survival of extremely premature infants, it is important to know the spectrum of clinical and laboratory manifestations of this phenomenon, in order to carry out adequate management.

Adherencia a la suplementación con vitamina D y factores determinantes de ella, durante el primer año de vida / Adherence to vitamin D supplementation and determinant factors during the first year of life

Introduction: Breastfed infants under one year of age may not get enough vitamin D; therefore a vitamin supplement is needed. The adherence to this policy has not yet been evaluated in Chile. Objective: To evaluate the adherence to vitamin D supplementation in children less than one year old and the determinant factors involved. Patients and Method: A cross-sectional study was carried out in three Catholic University Health Network centers. Breastfed infants under one year of age were included in the study. Their parents/guardians filled out a questionnaire about adherence to supplementation and its determinant factors. Results: 170 infants were recruited. 164 of them received supplementation, with a good adherence of 68.9%. The main reason for non-adherence was due to maternal forgetfulness. The identified risk factor for poor adherence was the number of maternal children. Conclusions: Vitamin D supplementation in Chile reaches high levels, but its adherence is poor. More education to parents on ways to avoid forgetting the supplement is needed as well as on identifying risk factors during medical consultations.

Introducción: Los lactantes menores de un año alimentados con leche materna poseen múltiples factores que impiden una adecuada adquisición de vitamina D, haciendo la suplementación necesaria. La adherencia a esta política de salud no ha sido evaluada en Chile. Objetivo: Evaluar la adherencia a la suplementación con vitamina D en niños menores de un año y conocer los factores determinantes que intervienen en ella. Pacientes y Método: Estudio transversal en tres Centros de Salud pertenecientes a Red de Salud Universidad Católica. Se reclutaron lactantes menores de 1 año que recibían lactancia materna y se realizó una encuesta a sus tutores indagando sobre adherencia a la suplementación y factores determinantes de ésta. Resultados: Se reclutaron 170 lactantes. Recibían suplementación 164 de ellos, reportando buena adherencia en un 68,9%. La principal causa para no adherir fue el olvido materno. El factor de riesgo identificado para mala adherencia fue el número de hijos maternos. Conclusiones: La suplementación con vitamina D en Chile alcanza niveles altos, pero la adherencia a ésta es deficiente. Se necesita de mayor educación a los padres al respecto, reforzando maneras de evitar el olvido e identificando los factores de riesgo en todas las consultas médicas.

[Adherence to vitamin D supplementation and determinant factors during the first year of life]. / Adherencia a la suplementación con vitamina D y factores determinantes de ella, durante el primer año de vida.

INTRODUCTION: Breastfed infants under one year of age may not get enough vitamin D; therefore a vitamin supplement is needed. The adherence to this policy has not yet been evaluated in Chile. OBJECTIVE: To evaluate the adherence to vitamin D supplementation in children less than one year old and the determinant factors involved. PATIENTS AND METHOD: A cross-sectional study was carried out in three Catholic University Health Network centers. Breastfed infants under one year of age were included in the study. Their parents/guardians filled out a questionnaire about adherence to supplementation and its determinant factors. RESULTS: 170 infants were recruited. 164 of them received supplementation, with a good adherence of 68.9%. The main reason for non-adherence was due to maternal forgetfulness. The identified risk factor for poor adherence was the number of maternal children. CONCLUSIONS: Vitamin D supplementation in Chile reaches high levels, but its adherence is poor. More education to parents on ways to avoid forgetting the supplement is needed as well as on identifying risk factors during medical consultations.