The observation on the change of the diameters of external pelvic measurement during pregnancy

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Author:
ZHOU Shui-sheng(The 3-rd Affiliated Hospital of SUN YAT-SEN University, Guangzhou 510630, China)
FANG Li(The 3-rd Affiliated Hospital of SUN YAT-SEN University, Guangzhou 510630, China)
YIN Yu-zhu(The 3-rd Affiliated Hospital of SUN YAT-SEN University, Guangzhou 510630, China)
()
Journal Title:
CHINA CLINICAL PRACTICAL MEDICINE
Issue:
Volume 2, Issue 05, 2008
DOI:
Key Word:
Pregnancy;Pelvic;Relaxin

Abstract: Objective To observe the change of the diameters of external pelvic measurement between mid-pregnancy and late pregnancy. Methods 60 pregnancy weman who had prenatal examination in our hospital between June,2007 to January,2008 were selected randomly. They were performed external pelvic measurement between 16 and 20 gestational weeks nd after 37 gestational weeks respectively. Interspinal diameter,intercristal diameter,external conjugate and transverse outlet were measured. Each diameter was compared between mid-pregnancy and late pregnancy using paired t-test. Results Interspinal diameter,intercristal diameter,external conjugate and transverse outlet of mid-pregnancy weman were (24.01±0.52) cm, (26.21±0.62) cm, (19.12±0.82) cm, (8.25±0. 61 ) cm,and those of late pregnancy weman were(25.11±0.55)cm, (27.08± 0.68) cm, (21.25±0.88 ) cm and (8.92±0.58 ) cm. There was significant difference between the two measurements. And each diameter of each pregnancy woman in late pregnancy was longer than that in mid-pregnancy. Conclusion The diameters of external pelvic measurement in late pregnancy are longer than those in mid-pregnancy.

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