Maternal Fetal Medicine
Seyedeh Noushin Ghalandarpoor-Attar; Fatemeh Rahimi-Sharbaf; Seyedeh Mojgan Ghalandarpoor-Attar
Volume 8, Issue 5 , September and October 2023, , Pages 533-537
Abstract
As widespread prophylaxis with anti-D Antibodies has dramatically diminished anti-D-associated hemolytic disease of the newborn (HDN), other antibodies-associated HDN has become relatively more significant. Two genes encode Rh proteins: the RhD gene coding for the D and the Rh CcEe gene coding for Cc ...
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As widespread prophylaxis with anti-D Antibodies has dramatically diminished anti-D-associated hemolytic disease of the newborn (HDN), other antibodies-associated HDN has become relatively more significant. Two genes encode Rh proteins: the RhD gene coding for the D and the Rh CcEe gene coding for Cc Ee Antigens. D is a rare Rh phenotype in which RBCs lack Cc/Ee antigens while D antigen is strongly expressed. Anti R17 antibodies are important monomorphic antibodies acting against all previously mentioned antigens. It can pass through the placenta as a G immunoglobulin, leading to fetal or neonatal hemolysis. Here, we reported an immunized pregnant female with D- - phenotype and a history of intrauterine fetal death who had high titer of anti-Rh17 antibodies in her subsequent pregnancy. We would discuss our management strategy which led to good perinatal outcomes. To the best of our knowledge, this is the second case of HDN reported in English written literature in Iran.
Maternal Fetal Medicine
Zahra Panahi; Seyedeh Noushin Ghalandarpoor-Attar; Azade Shabani; Mamak Shariat; Fahimeh Ghotbizadeh; Sedigheh Hantoushzadeh; Elham Feizabad; Seyedeh Mojgan Ghalandarpoor-Attar
Volume 7, Issue 6 , September and October 2022, , Pages 536-542
Abstract
Background & Objective: The thymus gland significantly affects fetal immune system maturation. Additionally, there is a linear association between thymus gland size and its performance. Given the high prevalence of vitamin D deficiency in Iran and scarce studies with conflicting results, subjecting ...
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Background & Objective: The thymus gland significantly affects fetal immune system maturation. Additionally, there is a linear association between thymus gland size and its performance. Given the high prevalence of vitamin D deficiency in Iran and scarce studies with conflicting results, subjecting maternal vitamin D concentration effect on fetal thymus, we decided to investigate maternal vitamin D concentration and its relation to fetal thymus size in mid-gestation. This study also aimed to generate a race-specific reference range.Materials & Methods: We performed a cross-sectional study of ultrasound measurements of the fetal thymus at 18-22 weeks of gestational age in 94 pregnant women and its correlation with maternal serum vitamin D levels from May to July 2021 at the tertiary center of Imam Khomeini Hospital in Tehran, Iran.Results: The mean values of thymus perimeter, thymus-thoracic ratio, thymus transverse diameter, and thymus area in all participants were 4.18±0.56 cm, 0.37±0.04, 1.56±0.21 cm, and 1.11±0.76 cm2, respectively. There was a trend toward decreased thymus perimeter and transverse thymus diameter with decreasing level of maternal vitamin D. There was also a significant correlation between thymus perimeter and transverse thymus diameter with fetal biometric indices and gestational age. Furthermore, a significant correlation was observed between the thymus perimeter and transverse thymus diameter. Conclusion: We generated a race-specific nomogram for fetal thymus size in Iranian pregnant women. Moreover, the observed trend toward decreased fetal thymus size with decreasing maternal vitamin D levels requires further prospective investigations. A high prevalence of vitamin D deficiency and low compliance with daily vitamin D intake during pregnancy was also shown, which requires a solution.