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KMID : 0357919860200010012
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Korean Journal of Pathology
1986 Volume.20 No. 1 p.12 ~ p.25
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Studies on Placentas among Koreans -Gross and microscopic examination of 4,000 consecutive placentas-
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Abstract
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As increasing concern for the fetal aspects of pregnancy, the availability of normal
standard of placenta becomes more and more important. because it is very difficult to
test the functional capacity of placenta. And for this reason anatnmic studies to
determine the normal relationship between the placenta and newborn infant have come
to be a considerable. importance.
A study of morphometric features of 4,000 consecutive placentas delivered at the Seoul
National University Hospital during a period of 3 years, from April 1979 to May 1982r
in relation to gestational age and weight of newborn was carried out.
The findings could be summarized as follows :
1) Among 4,000 consecutive deliveries there were 3,771 live borns 76 deadborns, and
153 cases of abortion, respectively.
2) The average weight and dimensions of term placenta were 511 gm and 19.94×17.09
×1.89 cm, respectively. The weight, size and volume of placenta were progressively
increased from 20 weeks of gestation till 41 Weeks.
3) Morphometric features of placenta such as placenta weight, dimension, fetoplacental
ratio and placental co-efficient showed a more significant correlation with birth weight
than with gestation age.
4) The average length of umbilical cord was 39.80 ㎝, with the range of 6 cm to 124
cm.
5) The congenital anomalies of newborn was encountered in 74 cases(1.85B) among
4,000 consecutive deliveries, Anomalies involving musculo-skeletal system was the most
common one,
6) The abnormal gross findings among 4,000 consecutive placentas included 6 cases of
single umbilical arteries, 4 cases of chorangioma, 545 cases of infarction anc 748 cases
of calcification.
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