Evaluate the correlations of maternal systemic ınflammatory markers such as neutrophil to lymphocyte ratio and platelet to lymphocyte ratio with gestation age

Objective: In this study, we aim to study the correlation between the maternal systemic inflammatory markers such as neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) including complete blood count (CBC) variables with gestation age, at the labor of our patients. Materials and Methods: This retrospective study was performed with 1127 patients and their infants. We used the maternal CBC variables analyzed within the last day before active labor. We analyzed the statistical differences between the NLR, PLR, and other CBC variables in terms of gestational age. Results: There was no statistically significant difference between the gestational age with NLR and PLR values, (P = 0.414 and P = 0.341, respectively). When we compare the NLR and PLR values in normal spontaneous vaginal delivery (NSVD) group, no statistically significant difference was found (P = 0.250; P = 0.995, respectively). In correlation analyses, no statistically significant correlation was detected between NLR and PLR with a birth weight of the infant and gestational age (P = 0.132 and P = 0.344, respectively). A linear, negative, weak correlation, and statistically significant correlation was detected between white blood cell count (WBC) with the infant's birth weight and gestational week (P < 0.01 and P = 0.024, respectively). Conclusions: Inflammation plays an important role especially at the beginning of the labor. In our study, we showed no correlation of the NLR and PLR with a gestational week or infant's birth weight at labor. Also, in our research, the NLR and PLR values did not differ statistically among the four groups in terms of the gestational age of delivery with the highest values in the preterm birth (<37 weeks) groups (P = 0.414, P = 0.341, retrospectively).