Is there a seasonal variation in the diagnosis of oligohydramnios?

Author： Varner Michael Noble William Dombrowski Mitchell Sibai Baha Rouse Dwight Paul Richard Caritis Steve Miodovnik Menachem Moawad Atef Iams Jay Witter Frank Romero Roberto Leveno Kenneth Meis Paul Wapner Ronald Rosen Mortimer Thurnau Gary van Dorsten Peter O'Sullivan Mary Conway Deborah the National Institute of Child Health and Human Development Maternal-Fetal Medicine Units Network for

Publisher： Informa Healthcare

ISSN： 1476-4954

Source： Journal of Maternal-Fetal and Neonatal Medicine, Vol.17, Iss.3, 2005-03, pp. : 173-177

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Abstract

Objective . We hypothesized that oligohydramnios would be diagnosed more frequently in the warm summer months when dehydration might be more common. Methods . The clinical diagnosis of oligohydramnios was extracted from the databases of four completed National Institute of Child Health and Human Development Maternal Fetal Medicine Units Network protocols. These data were stratified by quarter of delivery and compared using Fisher's Exact Test. Results . The clinical diagnosis of oligohydramnios was made more frequently in deliveries occurring in the summer months of June, July and August as compared with the remainder of the calendar year (7.2% vs 5.9%, p ?=?0.0178). Conclusions . In these studies the diagnosis of oligohydramnios is made more frequently in those pregnancies delivered during the summer months. Although not proven by this association, maternal dehydration may contribute to this finding.