Document Detail

Some unexpected results in time distribution analysis of spontaneous deliveries.
MedLine Citation:
PMID:  9701686     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To study time distribution of spontaneous deliveries. METHODS: A retrospective analysis of 1,791 spontaneous deliveries over a 4-year period (1993-1996) was made at the department of Obstetrics and Gynaecology, Civil Hospital, Fano, Italy. Circular statistics techniques (maximization of mean vector length) were used. RESULTS: Some unexpected infradian disuniformities (with 60- and 90-hour periods) were observed. Moreover, a correlation between the distribution of spontaneous deliveries and the lunar phases was found. CONCLUSIONS: In this study, some unexpected infradian disuniformities were found. However, no biological explanations appear to be reasonable in light of current knowledge, so the interpretation of these results remains an open question.
G Ghiandoni; R Seclì; M B Rocchi; G Ugolini; V Cancelli
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Gynecologic and obstetric investigation     Volume:  46     ISSN:  0378-7346     ISO Abbreviation:  Gynecol. Obstet. Invest.     Publication Date:  1998 Aug 
Date Detail:
Created Date:  1998-09-17     Completed Date:  1998-09-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7900587     Medline TA:  Gynecol Obstet Invest     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  88-90     Citation Subset:  IM    
Institute of Biomathematics, Urbino University, Urbino, Italy.
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MeSH Terms
Delivery, Obstetric / statistics & numerical data*
Retrospective Studies

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