Gestational diabetes and its effect on fetal thymus size: a case-control study

Area of Science:

• Obstetrics and Gynecology
• Fetal Medicine
• Endocrinology

Background:

• Fetal thymus size is a recognized indicator of pregnancy complications.
• Maternal diabetes is a significant risk factor in pregnancy.
• Identifying at-risk fetuses early is crucial for improved perinatal outcomes.

Purpose of the Study:

• To investigate the association between maternal diabetes and fetal thymus size.
• To determine if fetal thymus size can serve as a biomarker for identifying fetuses affected by maternal diabetes.
• To compare fetal thymus measurements between diabetic and healthy pregnant women.

Main Methods:

• A case-control study was conducted with 112 diabetic pregnant women and 112 healthy controls.
• Fetal thymus size was assessed using abdominal ultrasound, calculating the thymic-thoracic ratio (TTR) and thymus circumference.
• Demographic and obstetric data, including body mass index (BMI), were collected.

Main Results:

• Diabetic pregnancies showed a statistically significant reduction in both thymic-thoracic ratio (TTR) and thymus circumference compared to controls (p < 0.001).
• The odds ratio for TTR was 0.61 (95% CI: 0.48-0.78), and for thymus circumference was 0.95 (95% CI: 0.93-0.97).
• A significant difference in BMI was also observed between the case and control groups.

Conclusions:

• Reduced fetal thymus size, indicated by lower TTR and thymus circumference, is associated with maternal diabetes.
• Ultrasound evaluation of fetal thymus size may offer a potential method for identifying fetuses affected by maternal diabetes.
• Further research is needed to confirm if fetal thymus size can predict perinatal outcomes in diabetic pregnancies.