| Core body temperature and the thermoneutral zone: a longitudinal study of normal human pregnancy. | |
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MedLine Citation:
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PMID: 21087419 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Aim: Using a longitudinal study design, we investigated changes in maternal core temperature and ambient temperatures before and after a localized cooling procedure to the right hand. Methods: Fifteen pregnant women participated. The experiments were sequentially performed for 21 month periods on each subject: from the 8th week of gestation to 1 year after delivery on seven separate occasions (gestational weeks 8, 16, 26, 36 and 12, 24, 52 weeks post-partum). The experiments were conducted in a climactic chamber, allowing ambient temperature adjustment to each subjects' thermoneutral zone determined using Doppler ultrasound of the digital artery. Results: Maternal core temperature decreased from 37.1 °C (week 8) towards term, reaching a nadir (36.4 °C) at 12 weeks post-partum (P < 0.001). The ambient temperature required to reach the thermoneutral zone changed significantly from 26.5 °C (week 8) falling to its lowest point: 23.0 °C (week 36) (P < 0.001), then stabilized from 24 weeks post-partum. Conclusion: Maternal core temperature is highest in the first trimester but falls during pregnancy to a nadir 3 months post-partum. The ambient temperature required to reach the thermoneutral zone was 4 °C lower at 36 weeks of gestation compared with early pregnancy and late post-partum. Human temperature regulation is altered in pregnancy and for at least 3 months post-partum. |
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Authors:
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T W Hartgill; T K Bergersen; J Pirhonen |
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Publication Detail:
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Type: Journal Article Date: 2011-01-19 |
Journal Detail:
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Title: Acta physiologica (Oxford, England) Volume: 201 ISSN: 1748-1716 ISO Abbreviation: Acta Physiol (Oxf) Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101262545 Medline TA: Acta Physiol (Oxf) Country: England |
Other Details:
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Languages: eng Pagination: 467-74 Citation Subset: IM |
Copyright Information:
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© 2011 The Authors. Acta Physiologica © 2011 Scandinavian Physiological Society. |
Affiliation:
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Department of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway University of Oslo, Oslo, Norway Department of Dermatology, Oslo University Hospital, Rikshospitalet, Oslo, Norway. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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