Abstract:
:The purpose of the study was to determine the specific periods during pregnancy in which human fetal exposure to stress hormones affects newborn physical and neuromuscular maturation. Blood was collected from 158 women at 15, 19, 25, and 31 weeks' gestation. Levels of placental corticotropin-releasing hormone (CRH) and maternal cortisol were determined from plasma. Newborns were evaluated with the New Ballard Maturation Score. Results indicated that increases in maternal cortisol at 15, 19, and 25 weeks and increases in placental CRH at 31 weeks were significantly associated with decreases in infant maturation among males (even after controlling for length of gestation). Results also suggested that increases in maternal cortisol at 31 weeks were associated with increases in infant maturation among females, although these results were not significant after controlling for length of gestation. Findings suggest that stress hormones have effects on human fetal neurodevelopment that are independent of birth outcome.
journal_name
Dev Psychobioljournal_title
Developmental psychobiologyauthors
Ellman LM,Schetter CD,Hobel CJ,Chicz-Demet A,Glynn LM,Sandman CAdoi
10.1002/dev.20293subject
Has Abstractpub_date
2008-04-01 00:00:00pages
232-41issue
3eissn
0012-1630issn
1098-2302journal_volume
50pub_type
杂志文章abstract::Dopamine (DA) receptor responsitivity was investigated in adult rats that received intrastriatal (i.s.) injections of 6-OHDA (20 micrograms per striatum) on day of birth or postnatal Day 1 (Day 0/Day 1). Neonatally lesioned rats exhibited self-biting behavior and increases in stereotypic gnawing following treatment wi...
journal_title:Developmental psychobiology
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abstract::Severe psychological stress in the first trimester of pregnancy increases the risk of schizophrenia in the offspring. To begin to investigate the role of glucocorticoid receptors in this association, we determined the effects of the glucocorticoid dexamethasone (2 mg/kg), administered to pregnant rats on gestation day...
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journal_title:Developmental psychobiology
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abstract::Newly hatched domestic chicks were given extended free access to 7 rates of intermittent white light between .5 and 24 flashes per sec. Inspection of the data showed approaches and departures directed toward the light that increased in number and formed an orderly pattern as the rates neared 4 per sec and as the chick...
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