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태아 고환의 성숙과정에 관한 관찰
A Morphological Observation on Maturation of Fetal Testis

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Authors
송계용; 지제근
Issue Date
1981-12
Publisher
서울대학교 의과대학
Citation
Seoul J Med, Vol.22 No.4, pp. 503-512
Abstract
To evaluate the maturing process of male gonad
during intrauterine life , a morphologic study was
made, based on 135 normal human fetuses ranging
in age from 16 to 40 gestation weeks. These fetuses
were the products of induced deliveries, and were
found to have no associated diseases or congenital
anormalies at autopsy.
Following observations were made:
1. Cross diameter of fetal testis increased as the
fetus2S approached the term. There were two strueturally
different periods during fetal dεvelopment: ene
was rapid phase that lasted from 16th to 22nd week
of gestation, and the other was slow phase that was
from the 23rd to 40 weeks of gestational age.
2. The interstitial cells became prominent during
the perioid of the 16th to 20th week of gestation and
did rapidly disappear thereafter. 3. Mean diameter of seminiferous tubules decreased
from G8.3μ at the 16th week to 55.5t at the 21th
week and to 49. 0μ by term
4. Approximate ratio of spermatogonium to total
cells in seminiferous tubules \vere 18.7"-'23.9% throughout
the entire fetal period examined. E type
spermatogonia were generally dominant campanεnt
and A type spermatogonia appeared to decrease in
number as the fetuses reached the term.
5. The tunica albuginea was incompletely formed
and measured 40μ in thickness at the 16th week. It
became progressively stabilized and thickened to be
210μ at the 34th week and 240{, by term.
G. The rete testis communicated with seminiferous
tubules by abortive lumens at the 16th 까re c k and
became completely matured by 32 weeks of age.
7. There were 5 cases of ectopic adrenal glands
embedded in testis among 1:13 cases, thus showing an
incidence of 3.7%.
8. Based on above observations it could be concludcd
as that first evidence of maturation as a male
testis in fetal period was seen at tlF~ 24th week of
gestation, thereafter it became slowly and progressi~
vely matured to show adult type histology except for
spermatogenesis, by the 31th week of 앙 c s t a t lO n .
ISSN
0582-6802
Language
Korean
URI
https://hdl.handle.net/10371/9530
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Appears in Collections:
College of Medicine/School of Medicine (의과대학/대학원)Dept. of Medicine (의학과)The Seoul Journal of MedicineThe Seoul Journal of Medicine Vol. 22 No.4 (1981)
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