Document Detail

Clinical predictors of human blastocyst formation and pregnancy after extended embryo culture and transfer.
MedLine Citation:
PMID:  19409548     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the clinical factors associated with blastocyst development and pregnancy. DESIGN: Evaluation of a prospectively collected IVF database. SETTING: An academic IVF practice. PATIENT(S): Couples (n = 529) undergoing their first IVF cycle who qualified for extended embryo culture (more than six zygotes) over the past 5 years. INTERVENTION(S): Seven or eight zygotes were cultured for 5 days, assessed for quality, and then transferred with excess zygotes cryopreserved at the pronuclear stage. MAIN OUTCOME MEASURE(S): Clinical predictors of blastocyst development and pregnancy. RESULT(S): The mean blastocyst development rate was 49.8%, with a median number of total and good-quality blastocysts of 4 and 2, respectively. Clinical factors that were significantly associated with good-quality blastocyst formation were younger female age, increased parity, standard insemination, and lower doses of gonadotropins. Clinical factors that were significantly associated with successful pregnancy were younger female age, higher antral follicle counts, greater numbers of total and good-/excellent-quality blastocysts, and absence of male factor infertility. CONCLUSION(S): Several clinical factors are associated with the development of good-quality blastocysts after extended embryo culture and successful pregnancy outcome. These patient and cycle characteristics may be very useful in selecting the best candidates for extended embryo culture and single blastocyst transfers, thus optimizing outcomes while reducing the risks associated with multiple pregnancies.
Mika R Thomas; Amy E Sparks; Ginny L Ryan; Bradley J Van Voorhis
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-05-05
Journal Detail:
Title:  Fertility and sterility     Volume:  94     ISSN:  1556-5653     ISO Abbreviation:  Fertil. Steril.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-07-08     Completed Date:  2010-07-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372772     Medline TA:  Fertil Steril     Country:  United States    
Other Details:
Languages:  eng     Pagination:  543-8     Citation Subset:  IM    
Copyright Information:
Copyright 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.
Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology, University of Iowa College of Medicine, Iowa City, Iowa, USA.
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MeSH Terms
Databases, Factual
Embryo Culture Techniques / methods*,  standards
Embryo Transfer / methods*,  standards
Fertilization in Vitro / methods*,  standards
Infertility, Female / therapy*
Predictive Value of Tests
Pregnancy Outcome*
Young Adult
Zygote / cytology

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

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