Intrauterine fetal demise can be remote from the inciting insult in an animal model of hypoxia-ischemia.

Abstract:

BACKGROUND:Fetal hypoxia-ischemia (H-I) results in significant morbidity and mortality. Little is known about the timing of death in human stillbirths. The vulnerability of the fetus varies with age at the time of insult, but it is unknown what happens to the timing of fetal death in relation to a fetal insult. We asked the question of whether the timing of fetal death was influenced by the age at which the insult occurred. METHODS:Fetal H-I was achieved at three ages by sustained uterine ischemia in rabbits, mimicking the acute placental insufficiency of placental abruption. RESULTS:H-I at 22 d gestation (E22) resulted in fewer perinatal deaths than at E25 and E29. Fetal deaths were grouped into early and late perinatal deaths. Early perinatal death mostly occurred immediately after H-I and these fetuses delivered before term. Late perinatal death occurred between the insult and delivery at term gestation. Early perinatal death occurred more often in the E25 hypoxic-ischemic group as compared with those of the E22 hypoxic-ischemic group. CONCLUSION:There is an increasing vulnerability to hypoxia with increasing gestational age. Perinatal deaths may occur long after the episode of H-I. The timing of an intrauterine hypoxic-ischemic event cannot be inferred from the detection of fetal death.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Derrick M,Englof I,Drobyshevsky A,Luo K,Yu L,Tan S

doi

10.1038/pr.2012.65

subject

Has Abstract

pub_date

2012-08-01 00:00:00

pages

154-60

issue

2

eissn

0031-3998

issn

1530-0447

pii

pr201265

journal_volume

72

pub_type

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