Document Detail

Length of the third stage of labor at term pregnancies is shorter if placenta is located at fundus: prospective study.
MedLine Citation:
PMID:  17845322     Owner:  NLM     Status:  MEDLINE    
AIM: To investigate how the location of the placenta at term pregnancies affects the duration of the third stage of labor and to discuss the possible mechanisms affecting the duration of the third stage. We believe that this is the first prospective study comparing the duration of the third stage of labor according to placental location. METHODS: The placental implantation was determined as anterior (n = 78), posterior (n = 59), or fundal (n = 64) by ultrasound, in 201 women with singleton pregnancies. After delivery of the newborn, oxytocin infusion was routinely given. Duration of the third stage of labor was compared by anova. P < 0.05 was determined as significant. RESULTS: The duration of the third stage of labor was 10.36 +/- 5.94 min, 10.44 +/- 5.35 min, and 8.12 +/- 4.25 min with placentas located anteriorly, posteriorly, and fundal, respectively. The length of the third stage was significantly shorter in the fundal placenta group. CONCLUSION: In this study, the length of the third stage of labor was approximately 2 min shorter with placentas located at the fundus compared to the other two groups. The mechanism responsible for shorter duration may be the bipolar separation of fundal placentas in contrast to usual unipolar down-up separation of anterior or posterior placentas. Another contributing factor may be the use of oxytocin infusion for the management of the third stage, however this should be investigated by further studies by using real time ultrasonography.
M Metin Altay; Ali Kemal Ilhan; Ali Haberal
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of obstetrics and gynaecology research     Volume:  33     ISSN:  1341-8076     ISO Abbreviation:  J. Obstet. Gynaecol. Res.     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-09-11     Completed Date:  2007-12-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9612761     Medline TA:  J Obstet Gynaecol Res     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  641-4     Citation Subset:  IM    
Turkish Ministry of Health Ankara Etlik Maternity and Women's Health Academic and Research Hospital, Ankara, Turkey.
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MeSH Terms
Infant, Newborn
Labor Stage, Third / physiology*
Oxytocin / pharmacology
Placenta / physiology*,  ultrasonography
Prospective Studies
Reg. No./Substance:

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