OBJECTIVE: To determine the effect of SARS-CoV-2 infection on fetal thymus size by ultrasound. STUDY DESIGN: In this prospective study sonographic fetal thymus size was measured in pregnant women attending our hospital with confirmed SARS-CoV-2 infection by RT-PCR test and age-matched control group. The anteroposterior thymic and the intrathoracic mediastinal diameter was determined in the three-vessel view and their quotient, the thymic-thoracic ratio, was calculated. Results were compared between these two groups. RESULTS: Thirty-six SARS-CoV-2-infected and 47 control group pregnant women were included in this study. Two groups were similar in terms of demographic features and no difference was found for fetal thymus size. CONCLUSION: COVID-19 seems to have no adverse effect on fetal thymus size in mild and moderate patients during the acute phase of the infection.

Purpose To investigate the effects of laboratory-confirmed SARS-CoV-2 infection on thyroid function tests (TFTs) in pregnant women and to evaluate whether TFT changes are related to the severity and prognosis. Methods Consecutive pregnant women tested for SARS-CoV-2 by RT-PCR at Ankara City Hospital were recruited between January 2021 and September 2021. Thyroid-stimulating hormone (TSH), free thyroxine (FT4) and free triiodothyronine (FT3), thyroid peroxidase antibody (anti-TPO), and thyroglobulin antibody (anti-TG) were measured on admission. Results Among 747 eligible pregnant women with the same baseline characteristics, 369 RT-PCR-positive women in the patient group and 378 RT-PCR-negative women in the control group were included in the analyses. Pregnant women in the patient group had significantly lower TSH, FT4, FT3, Anti TPO, and Anti TG concentrations compared with those in the control group (p < 0.001). The proportion of patient groups with mild, moderate, severe, and critical diseases were 297 (80.4%), 40 (10.8%), 17 (4.6%), and 15 (4.2%), respectively, among which with the moderate, severe, and critical disease had significantly lower FT3 values (2.5 vs 2.19 pg/mL, p < 0.001) and higher nonthyroidal illness syndrome (NTIS) (29.2 vs. 8.4%, p < 0.001) than those with mild disease. Lower FT3 values increased the risk of ICU admission, NICU admission, and severe disease (p < 0.001). FT3 and TSH correlated positively with lymphocytes (p < 0.001) and negatively correlated with C-reactive protein (CRP) (p < 0.001, p = 0.005). Conclusion The SARS-CoV-2 infection seems to have an impact on the TFTs of pregnant women, and particularly FT3 level seems to be correlated with disease severity.

Background/Objectives: The objective of this study was to assess the diagnostic accuracy of the Triglyceride-Glucose (TyG) index for screening gestational diabetes mellitus (GDM) at 24–28 weeks of gestation, to determine its optimal diagnostic threshold, and to compare its predictive performance with conventional lipid ratios (LDL/HDL, TG/HDL, and TC/HDL). Materials and Methods: We retrospectively analyzed 440 pregnant women with singleton pregnancies who underwent a 75 g oral glucose tolerance test (OGTT) between January and July 2025. The TyG index and lipid ratios were calculated, and their associations with GDM were evaluated. Subgroup analyses were conducted to assess the efficacy of the TyG index in predicting GDM, using logistic regression to estimate odds ratios (ORs) with 95% confidence intervals (CIs), and receiver operating characteristic (ROC) curve analysis along with restricted cubic spline modeling to evaluate diagnostic performance and determine the optimal cutoff value. Results: The overall prevalence of GDM, as defined by the IADPSG (International Association of the Diabetes and Pregnancy Study Groups) criteria, was 22.7%. The median TyG index was significantly higher in the GDM group compared with the non-GDM group (9.1 vs. 8.9, p = 0.001). The TyG index was a significant predictor of GDM (p < 0.05), with each one-unit increase associated with significantly higher odds of GDM (OR = 12.29), after adjusting for covariates. ROC analysis demonstrated an AUC of 0.716 (95% CI: 0.627–0.793, p < 0.001) for the TyG index, and the optimal cut-off value was identified as 9.35, yielding a sensitivity of 38.5% and a specificity of 96.5% and a negative predictive value of 83.7%. Subgroup analyses indicated that the TyG index had limited discriminative ability for predicting GDM in both the post-load and insulin-requiring groups. Among conventional lipid ratios, TG/HDL demonstrated the highest predictive performance (AUC = 0.587), while LDL/HDL (AUC = 0.483) and TC/HDL (AUC = 0.509) demonstrated low predictive accuracy. Compared with conventional lipid ratios, the TyG index demonstrated superior predictive performance. Conclusions: A higher TyG index was positively associated with the development of GDM and showed better predictive ability than conventional lipid ratios. However, its low sensitivity limits its use as a standalone diagnostic tool, suggesting it may be most useful when combined with other clinical parameters.

Aim: To review our experience in fetuses with prenatally diagnosed with polyhydramniosis Materials and Method: Retrospective study of fetuses prenatally diagnosed with polyhydramniosis between October 2023 and January 2025 in a tertiary referral center. Results: 104 pregnant women were included in the final analysis. When we classify the cases according to etiology of polyhydramnios, 31 (29.8 %) women had pregestational or gestational diabetes, in 8 (7.6 %) infants major structural or significant genetic anomalies were detected prenatally or postnatally, 65 (62.6 %) cases were classified as idiopathic and recent TORCH positivity was not observed in any of the cases 0 (0%). Most cases were delivered at term (81.8%), median gestational week at delivery was 36 (range, 23-41), and the mean standard deviation birthweight was 2996±969 grams. Polyhydramnios was more common in male than in female fetuses (67% vs 33%). Termination of pregnancy was selected in 1 (0.9%) of the cases diagnosed with acrania and performed at 23 weeks of pregnancy with fetocide. There were 2 intrauterine fetal demise at 32 and 35 weeks of gestation diagnosed with Trisomy 18 and cardiac anomaly respectively. 101 (97.1 %) were live born and 29 of 101 live born infants were needed neonatal intensive care unit. Conclusion: Glucose tolerance test, detailed sonography, including fetal echocardiography should be performed in the pregnancies complicated with polyhydramnios. However, it is also reassuring for parents that the vast majority of cases are idiopathic.