Development of human hip joint in the second and the third trimester of pregnancy; a cadaveric studyReportar como inadecuado

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BMC Developmental Biology

, 13:19

Orthopedics and biomechanics


BackgroundThe purpose of the study was an evaluation of fetal hip joint morphology during the second and the third trimester of pregnancy. Serial sections were performed on 23 cadaver infants.

ResultsThe mean lunar age was 6.6 months. Femoral shaft length FSL and width of the proximal and distal epiphysis were x-rayed to determine fetal age. The neck shaft angle NSA, the femoral antetorsion angle FAA, the acetabulum anteversion angle AAA and the acetabulum slope angle ASA were measured. Hip development ratios were plotted for all cadaveric species and revealed: flat FSL-NSA slope pattern, upward FSL-FAA slope pattern and downward slope pattern for FSL-ASA and FSL-AAA ratios. The changes, observed during the developmental period, were not statistically significant. NSA did not change during the second or the third pregnancy trimester. FAA increased during pregnancy but the changes were not statistically significant. AA, as well as ASA, showed a decreasing trend during the second and the third pregnancy trimester, however, with no correlations to age.

ConclusionDespite an increasing depth and growing dimensions of the acetabulum in the uterus, its orientation does not change in any significant way.

KeywordsFetus Hip joint development Hip dysplasia Hip anatomy Electronic supplementary materialThe online version of this article doi:10.1186-1471-213X-13-19 contains supplementary material, which is available to authorized users.

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Autor: Adrian Masłoń - Marcin Sibiński - Mirosław Topol - Karol Krajewski - Andrzej Grzegorzewski


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