Document Detail


Light exposure at night, sleep duration and sex hormone levels in pregnant Japanese women.
MedLine Citation:
PMID:  22333297     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The association between light exposure at night and sex hormone levels in utero has scarcely reported. We assessed the associations between sleep duration or being awake in the late evening hours, which can be as indicator of light exposure at night, and the maternal and umbilical blood hormone levels during pregnancy and at delivery among Japanese women. The data for 236 women and their newborns who visited a maternal clinic in Gifu, Japan, between May 2000 and October 2001 were analyzed. Maternal blood samples were obtained at approximately the 10th weeks, 29th weeks of gestation, and at delivery. Umbilical cord artery blood was immediately drawn after birth. Information for sleep during pregnancy was obtained by a self-administered questionnaire. The levels of estradiol and testosterone were measured using radioimmunoassay. Maternal serum testosterone level in the 10th week was higher among those who were awake at or after 1:00 a.m. than among those who were asleep at that time (P = 0.032). Maternal estradiol level in the 29th week was inversely associated with sleep duration on weekends (P = 0.043). Umbilical testosterone level at delivery inversely correlated with sleep duration on weekdays (P = 0.030). These associations were somewhat stronger among mothers with female offspring than those with male offspring. These results suggested that exposure to light at night might increase sex hormone levels during pregnancy.
Authors:
Keiko Wada; Chisato Nagata; Kozue Nakamura; Shinichi Iwasa; Makoto Shiraki; Hiroyuki Shimizu
Related Documents :
3630607 - Study of the cuspal ridges of the upper first molars in a modern japanese population.
8085617 - Brief communication: bioarcheological and biocultural evidence for the new england vamp...
15875207 - First trimester diagnosis of partial mole.
15596267 - Diagnosis and outcome of complete hydatidiform mole coexisting with a live twin fetus.
22792357 - Estrogen mediates innate and adaptive immune alterations to influenza infection in preg...
6650597 - Calcium metabolism in the hypertensive mother, fetus, and newborn infant.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-15
Journal Detail:
Title:  Endocrine journal     Volume:  -     ISSN:  1348-4540     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9313485     Medline TA:  Endocr J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Epidemiology & Preventive Medicine, Gifu University Graduate School of Medicine, Gifu 501-1194, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Pan-Britain, mixed-methods study of multidisciplinary teams teaching parents to manage children's lo...
Next Document:  Reference genome-independent assessment of mutation density using restriction enzyme-phased sequenci...