Secular changes in human fetuses normally aborted in years 1965-1985

Area of Science:

• Human Embryology
• Fetal Development
• Anthropometry

Background:

• Accurate assessment of fetal development requires careful consideration of gestational age and abortion causes.
• Variability in fetal age determination and abortion etiology can introduce significant errors in developmental studies.
• Standardized methodology is crucial for reliable fetal growth research.

Purpose of the Study:

• To investigate time-dependent variability in somatotropic features relative to fetal developmental stage.
• To analyze intersexual differences in fetal growth parameters.
• To establish reliable anthropometric data for specific fetal age groups.

Main Methods:

• Analysis of fetal material from precisely dated abortions (5th and 6th months).
• Selection of fetuses with similar environmental conditions and external abortion causes.
• Measurement of seating body length (v-tub), head perimeter, shoulder width (a-a), and body weight.
• Calculation of mean values for each feature at identical points of fetal age, considering sex differences.

Main Results:

• Quantification of variations in body length, head perimeter, shoulder width, and body weight.
• Identification of time-dependent trends in these anthropometric measurements.
• Comparison of growth parameters between male and female fetuses.

Conclusions:

• Established normative data for key anthropometric parameters at specific fetal ages.
• Highlighted the importance of precise dating and controlled conditions in fetal growth studies.
• Provided insights into sex-specific growth patterns during the 5th and 6th months of gestation.