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Introduction: Intravenous immunoglobulin (IVIG) has been widely used to treat the hemolytic disease of the newborn (HDN). Although it has been shown that IVIG treatment reduces the duration of phototherapy and hospitalization, the use of IVIG in hemolytic disease due to ABO incompatibility has been controversial in recent years. This study aimed to investigate the role of IVIG in the prevention of exchange transfusion in infants with ABO HDN who presented with bilirubin levels at or above the level of exchange transfusion., Materials and Methods: This study evaluated the data of infants with ABO HDN in the Turkish Neonatal Jaundice Online Registry. The infants with ABO HDN who met the total serum bilirubin level inclusion criteria (within 2-3 mg/dL of exchange transfusion or even above exchange transfusion level) were included in the study according to the guidelines from the American Academy of Pediatrics and the Turkish Neonatal Society. All patients were managed according to the unit protocols recommended by these guidelines and received light-emitting diode (LED) phototherapy. Infants who only received LED phototherapy, and who received one dose of IVIG with LED phototherapy were compared., Results: During the study period, 531 term infants were included in the study according to inclusion criteria. There were 408 cases in the phototherapy-only group, and 123 cases in the IVIG group. The demographic findings and the mean bilirubin and reticulocyte levels at admission were similar between the groups ( p > 0.05), whereas the mean hemoglobin level was slightly lower in the IVIG group ( p = 0.037). The mean age at admission was earlier, the need for exchange transfusion was higher, and the duration of phototherapy was longer in the IVIG group ( p < 0.001, p = 0.001, and p < 0.001, respectively). The rate of re-hospitalization and acute bilirubin encephalopathy (ABE) was higher in the IVIG group ( p < 0.001 and p = 0.01, respectively)., Conclusion: In this study, we determined that one dose of IVIG did not prevent an exchange transfusion nor decrease the duration of phototherapy in infants, who had bilirubin levels near or at exchange transfusion level, with hemolytic disease due to ABO incompatibility., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Okulu, Erdeve, Kilic, Olukman, Calkavur, Buyukkale, Cetinkaya, Ulubas, Demirel, Hanta, Ertugrul, Gultekin, Tuncer, Demir, Bilgin, Narli, Yildiz, Terek, Koroglu, Seren, Ozyazici, Ozdemir, Turgut, Narter, Akin, Ozyazici, Zenciroglu, Asker, Gokmen, Salihli, Bulbul, Zubarioglu, Atasay, Koc and Turkish Neonatal Society IVIG Study Group.)

Background and Aim: Retinopathy of prematurity (ROP), is a vasoprolipherative disorder of the immature retina and a major cause of preventable blindness in childhood. Although the development of ROP is multifactorial, the main reasons are lower gestational age and birth weight. However, in twins their gestational ages were the same, ROP development can be discordant. This study aims to evaluate the etiologic factors of discordant ROP development in twins., Methods: We reviewed the last 5 years' records and found the twins whose discordant ROP development. This discordance was; 1. Different stages of ROP, 2. One sibling treated the other is not, 3. One sibling has aggressive posterior ROP the other is not, 4. one sibling has more influenced area as zones the other is not. We documented some data of these twins, as birth order, birth weight, resuscitation at birth, morbidities, the number of hemotransfusion, age of regaining birth weight, relative weight gain at 28 weeks., Results: A total of 26 cases of 13 twins were evaluated. The mean gestational age and birth weight of the whole study group were 27.7 ± 2, and 1053 ±  364 grams, respectively. We found that more transfused preterm baby in twins is more likely to show severe ROP. Additionally, sepsis and the duration of mechanical ventilation may be risk factors for more severe ROP in twins., Conclusions: We can reduce discordant retinopathy in less than 32-weeks premature twins by using methods such as cord milking and by improving non-invasive ventilation modalities.