[The problem of the large fetus].

Area of Science:

• Endocrinology
• Developmental Biology
• Histology

Background:

• The adenohypophysis and epiphysis play crucial roles in fetal development and hormonal regulation.
• Understanding the morphological and functional relationships within these glands is vital for assessing intrauterine growth.
• Previous research has indicated potential links between maternal environment and fetal development, but specific gland correlations require further elucidation.

Purpose of the Study:

• To investigate the morphological characteristics and morphometry of the adenohypophysis and epiphysis in fetuses of different weight categories.
• To determine the correlation between fetal growth parameters and specific cellular features of the adenohypophysis, including acidophil diameter and nuclear-cytoplasmic ratio.
• To explore the relationship between fetal growth and the expression of somatotropic hormone within the adenohypophysis.

Main Methods:

• Comparative morphological study of adenohypophysis and epiphysis in fetuses weighing ≥4.0 kg versus a control group (3.0-3.5 kg).
• Morphometric analysis of adenohypophysis acidophils, including diameter and nuclear-cytoplasmic ratio.
• Immunofluorescence staining to assess the intensity of specific somatotropic hormone (STH) localization in adenohypophysis sections.

Main Results:

• A strong positive correlation (+0.81) was observed between fetal growth and adenohypophysis acidophil diameter.
• A strong negative correlation (-0.70) was found between fetal growth and the acidophil nuclear-cytoplasmic ratio.
• A strong positive correlation (+0.73) linked fetal growth to the intensity of STH-specific immunofluorescence in the adenohypophysis.

Conclusions:

• Functioning of the adenohypophysis, particularly concerning somatotropic hormone, is significantly correlated with intrauterine fetal growth.
• The findings suggest a potential influence of environmental light conditions on both intrauterine fetal growth and epiphysis function during gestation.
• Further research is warranted to elucidate the precise mechanisms linking maternal light exposure, hormonal regulation, and fetal development.