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Diameters of the human fetal pelvis. Preliminary report
B Kroczek-Grzadzielska1, L Sobocińska-Bzdega
1Department of Anatomy, Academy of Medicine, Poznań.
Folia Morphologica
|January 1, 1991
Insights
Pelvic diameters increase with fetal development. Sex differences in fetal pelvis size are observable as early as 13 weeks gestation.
Area of Science:
- Anatomy
- Embryology
- Fetal Development
Background:
- Understanding fetal pelvic development is crucial for obstetrics and gynecology.
- Pelvic morphology influences birth outcomes and requires detailed study during gestation.
Purpose of the Study:
- To investigate the growth patterns of fetal pelvic diameters.
- To identify the earliest gestational age at which sexual dimorphism in pelvic dimensions becomes apparent.
Main Methods:
- Measurements of multiple pelvic diameters were performed on 70 human fetuses.
- The fetuses ranged in age from 13 to 28 weeks of gestation.
Main Results:
- All measured pelvic diameters showed a significant increase with advancing gestational age.
- Distinct sex-based differences in pelvic size were detectable from the 13th week of gestation.
Conclusions:
- Fetal pelvic dimensions grow progressively throughout the second trimester.
- Sexual differentiation of the pelvis begins early in fetal development, by the 13th week.
Abstract:
Measurements of the diameters of the pelvis were made in 70 fetuses aged 13-28 weeks. With the advancement of the development all diameters of the pelvis increase. Sex differences in the size of the pelvis were noted in fetuses of 13th week.