Objetivo: Evaluar la relación entre los niveles de FS y Hb materna con los niveles de FS y Hb de sus RN. Material y métodos: Estudio correlacional, que incluyó gestantes con embarazo único a término, sin complicaciones y sus RN de parto eutócico. Se excluyeron gestantes con enfermedad crónica sistémica, infecciones, consumo de tabaco, hemoglobinopatias, RN con malformaciones, bajo peso y prematuridad. La muestra fue estimada al 95 % de confianza y 90 % de poder estadístico. Las gestantes fueron captadas de manera consecutiva. Se determinó FS por quimoluminiscencia y Hb por impedancia en sagre venosa materna y cordón umbilical. Se consideró anemia materna: Hb<11g/dl, DH: FS<30ng/ml. Anemia y DH en el RN según sexo. Se realizó estadística descriptiva, (r) de Pearson o Spearman, T student y prueba de Suma de Rangos de Wilcoxon. Se consideró significativo p<0,05. Resultados: Se incluyeron 74 gestantes y sus RN. La edad materna fue 26 años (RIQ:22-31) y edad gestacional 39,06 ±1,0 semanas. La mediana de FS y Hb del RN fueron significativamente mayores a la materna (p=0,001). El 36,4 % de madres presentaron anemia (leve o moderada en 96,3%), Hb ≥9g/dl en 94,6% y DH en 67,6%. Ningún RN presentó DH o anemia. El análisis global entre FS y Hb materna y del RN mostró correlación nula o débil no significativa, categorizando la FS materna en <30ng/ml la correlación fue moderada y significativa (r=0,339; p=0,01). No se encontró diferencia significativa entre las características antropométricas de RN de madres anémicas versus no anémicas. Conclusiones: La anemia materna leve o moderada con Hb≥9g/dl no mostró correlación significativa con FS y Hb del RN. Con FS materna <30ng/ml se encontró correlación significativa. Se requiere validar este punto de corte de FS para aplicarlo en el diagnostico oportuno y monitoreo de la DH en el tercer trimestre de gestación.Objective: To evaluate the relationship between maternal ferritin (FS) and hemoglobin (Hb) levels with those of their newborns (RN). Materials and Methods: A correlational study was conducted, including singleton pregnancies at full term without complications, and their newborns delivered through normal childbirth. Pregnant women with chronic systemic diseases, infections, tobacco use, hemoglobinopathies, newborns with malformations, low birth weight, and prematurity were excluded. The sample size was estimated with 95% confidence and 90% statistical power. Pregnant women were consecutively recruited. FS was determined by chemiluminescence, and Hb by impedance in maternal venous blood and umbilical cord. Maternal anemia was defined as Hb<11g/dl, and low FS as FS<30ng/ml. Anemia and low FS in newborns were categorized by gender. Descriptive statistics, Pearson or Spearman's (r) correlation, Student's t-test, and Wilcoxon Rank-Sum test were employed. A significance level of p<0.05 was considered. Results: 74 pregnant women and their newborns were included. Maternal age was 26 years (IQR: 22-31) and gestational age was 39.06 ± 1.0 weeks. The median FS and Hb levels in newborns were significantly higher than in mothers (p=0.001). 36.4% of mothers had anemia. (mild or moderate in 96.3%), Hb ≥9g/dl in 94.6% and HD in 67.6%. No newborn had low FS or anemia. The overall analysis between maternal FS and Hb and newborn FS and Hb showed no significant correlation, but when maternal FS was <30ng/ml, the correlation was moderate and significant (r=0.339; p=0.01). There was no significant difference in anthropometric characteristics between newborns of anemic and non-anemic mothers. Conclusions: Mild to moderate maternal anemia with Hb≥9g/dl did not show a significant correlation with newborn FS and Hb. A significant correlation was found when maternal FS was <30ng/ml. This FS cutoff point needs validation for timely diagnosis and monitoring of low FS in the third trimester of pregnancy.