Document Detail

Selection of the optimal day for oocyte retrieval based on the diameter of the dominant follicle in hCG-primed in vitro maturation cycles.
MedLine Citation:
PMID:  18775885     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The efficiency of in vitro maturation (IVM) techniques is suboptimal compared with controlled ovarian stimulation combined with IVF cycles, and studies are needed to identify factors that predispose IVM cycles to success or failure. We compared the outcome of IVM cycles with different dominant follicle (DF) size at oocyte retrieval following hCG priming. METHODS: IVM was performed in 160 patients with polycystic ovaries (171 cycles). We administered 10,000 IU hCG s.c. 35-38 h before oocyte collection when endometrial thickness reached at least 6 mm. IVM cycles were retrospectively analyzed according to DF diameter as follows; Group 1: DF diameter <or=10 mm, Group 2: between 10 and 14 mm, Group 3: >14 mm. RESULTS A positive correlation was observed between DF size and number of in vivo matured oocytes collected (Group 1, 2 and 3 = 6.9, 10.6 and 15.1%, respectively). The rates of IVM, fertilization and embryo development were similar among the sibling immature oocytes collected from the three groups. However, clinical pregnancy rate in Group 2 (40.3%) was higher than Group 3 (17.1%) (P < 0.05). Moreover, implantation rates in Groups 1 (13.6%) and 2 (14.3%) were higher than Group 3 (4.9%) (P < 0.01). CONCLUSIONS: Our results suggest that oocyte collection in IVM cycles should be performed when the DF is 14 mm diameter or less. Sibling immature oocytes may be affected detrimentally if a DF >14 mm is present at oocyte collection.
Weon-Young Son; Jin-Tae Chung; Belen Herrero; Nicola Dean; Ezgi Demirtas; Hananel Holzer; Shai Elizur; Ri-Cheng Chian; Seang Lin Tan
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Publication Detail:
Type:  Journal Article     Date:  2008-09-04
Journal Detail:
Title:  Human reproduction (Oxford, England)     Volume:  23     ISSN:  1460-2350     ISO Abbreviation:  Hum. Reprod.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-18     Completed Date:  2009-01-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8701199     Medline TA:  Hum Reprod     Country:  England    
Other Details:
Languages:  eng     Pagination:  2680-5     Citation Subset:  IM    
Department of Obstetrics and Gynecology, McGill Reproductive Center, Royal Victoria Hospital, McGill University, Montreal, QC, Canada.
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MeSH Terms
Chorionic Gonadotropin / therapeutic use*
Infertility, Female / etiology
Oocyte Retrieval / methods*
Ovarian Follicle / cytology*
Ovulation Induction / methods
Polycystic Ovary Syndrome / complications
Reg. No./Substance:
0/Chorionic Gonadotropin

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

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