Effects of smoking on fetoplacental-maternal system during pregnancy

Mochizuki, M.; Maruo, T.; Masuko, K.; Ohtsu, T.

American Journal of Obstetrics and Gynecology 149(4): 413-420

1984


ISSN/ISBN: 0002-9378
PMID: 6203408
DOI: 10.1016/0002-9378(84)90156-x
Document Number: 403405
Fetoplacental function and maternal nutritional status were assessed in order to clarify the mechanism of retarded fetal growth in pregnant women who smoked. Dehydroepiandrosterone sulfate (DHA-S) loading tests and measurements of cotinine, a major metabolite of niccotine, were also made. In heavy smokers, urinary estriol and serum levels of human placental lactogen (hPL) were lower than those in nonsmokers. There was no difference in maternal nutrition between smokers and nonsmokers. Heavy smokers demonstrated a lower conversion of DHA-S to estradiol than did nonsmokers. Levels of cotinine in maternal blood and umbilical cord blood of heavy smokers were remakably higher than those in nonsmokers. Microscopic examination showed atrophic and hypovascular changes in placental villi from mothers who smoked. These results suggest that retarded fetal growth in heavy smokers is due to impairment of uteroplacental circulation as a ressult of the vasoconstricting effect of nicotine.

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