The comparison of vessels in elective and spontaneous abortion decidua in first trimester pregnancies: importance of vascular changes in early pregnancy losses.

Abstract:

BACKGROUND:To determine whether adequate trophoblastic migration and maternal placental perfusion occurs in cases of early pregnancy loss, we compared vessels in elective abortion decidua with those in spontaneous abortion decidua. METHODS:Elective abortion decidua at 5-11 weeks (n = 40) were compared with spontaneous abortion decidua at 5-12 weeks (n = 25). Also normal late secretory endometrial biopsy specimens (n = 10) were examined. The cross-sections of veins and arteries were counted in 25 elective and 15 spontaneous abortion materials. The number of the veins that contain trophoblastic fragments and the number of the spiral arteries converted by trophoblasts were determined. Statistical significance by Mann-Whitney U and Spearman's correlation test was p < 0.05. RESULTS:All sets of decidua had dilated veins, but no secretory endometrium did. The ratio of converted spiral arteries to nonconverted arteries was much more in elective abortion decidua (113/938, 12.04%) than in spontaneous abortion decidua (11/511, 2.15%) (p < 0.001). CONCLUSIONS:The presence of converted arteries, dilated veins, and intravenous trophoblastic fragments in decidual specimens were evidence of intervillous circulation and placental perfusion by maternal circulation in the first trimester. Also the insufficient conversion of the arteries in spontaneous abortions might be responsible for many cases of early pregnancy loss.

authors

Gun BD,Numanoglu G,Ozdamar SO

doi

10.1080/00016340500501731

subject

Has Abstract

pub_date

2006-01-01 00:00:00

pages

402-6

issue

4

eissn

0001-6349

issn

1600-0412

pii

740282552

journal_volume

85

pub_type

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