Study Results
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Basic Information
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COMPLETED
NA
773 participants
INTERVENTIONAL
2016-09-01
2018-12-01
Brief Summary
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Detailed Description
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Wale et Gardner have investigated this impact of oxygen tension on mouse embryo development, by comparing four culture conditions: (i) group 1: culture exclusively at 5% O2 ; (ii) group 2: culture at 5% from Day 0 to Day 2, then at 20% from Day 2 to Day 4; (iii) group 3: at 20% then at 5% from Day 2; (iv) and group 4: culture exclusively at 20% Interestingly, no difference in terms of blastulation had been reported between groups 1 and 2, suggesting the OS might impact only at cleavage stage, and that switching culture under atmospheric conditions from Day 2/3 might not influence embryo development thereafter.
Hence, all those investigations suggest that embryo culture using trigas incubators (5% O2, 6% CO2 and 89% N2) would be preferable. However, this system is very expensive, notably due to a high N2 consumption, and requires a more complicated logistics (e.g. N2 levels monitoring). Yet, Wale and Gardner's results imply that sequential culture conditions (trigas from Day 0 to Day 2/3, then conventional incubator at 20% O2 until blastocyst stage) could be an valuable option, reducing the costs and, essentially, without any detrimental impact on embryo development.
The present study has two main objectives: (i) to confirm the improvement in embryo quality under low oxygen tension and (ii) to demonstrate the negative impact of OS only at cleavage stage in human embryos, as assumed by Wale and Gardner. For that purpose, we designed an original prospective randomized study comparing three culture conditions: (i) culture excusively at 20% O2 (Day 0 to Day 6) (Group A); (ii) culture exclusively at 5% O2 (Day 0 to Day 6) (Group B); (iii) culture at 5% from Day 0 to Day 3, then at 20% from Day 3 to Day 6) (Group C). Inclusion criteria and outcome measures are detailed in the following sections.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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group A
Embryo culture at 20% O2
20% oxygen
culture excusively at 20% O2 (Day 0 to Day 6)
group B
Embryo culture at 5% O2
5% oxygen
culture excusively at 5% O2 (Day 0 to Day 6)
group C
Embryo culture at 5% O2 and at 20% O2
20 % and 5 % oxygen
culture at 5% from Day 0 to Day 3, then at 20% from Day 3 to Day 6)
Interventions
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20% oxygen
culture excusively at 20% O2 (Day 0 to Day 6)
5% oxygen
culture excusively at 5% O2 (Day 0 to Day 6)
20 % and 5 % oxygen
culture at 5% from Day 0 to Day 3, then at 20% from Day 3 to Day 6)
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* IVF / ICSI Attempt with Ejaculated Sperm Sperm (Fresh or Frozen)
* At least 8 oocytes retrieved in total
* Good understanding of the protocol by the patient
* Informed and consentment signed of the couple
Exclusion Criteria
18 Years
39 Years
ALL
No
Sponsors
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Assistance Publique - Hôpitaux de Paris
OTHER
Responsible Party
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Principal Investigators
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Christophe Sifer
Role: PRINCIPAL_INVESTIGATOR
AP-HP_Hôpital Jean Verdier
References
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Ciray HN, Aksoy T, Yaramanci K, Karayaka I, Bahceci M. In vitro culture under physiologic oxygen concentration improves blastocyst yield and quality: a prospective randomized survey on sibling oocytes. Fertil Steril. 2009 Apr;91(4 Suppl):1459-61. doi: 10.1016/j.fertnstert.2008.07.1707. Epub 2008 Aug 22.
Fischer B, Bavister BD. Oxygen tension in the oviduct and uterus of rhesus monkeys, hamsters and rabbits. J Reprod Fertil. 1993 Nov;99(2):673-9. doi: 10.1530/jrf.0.0990673.
Guo N, Li Y, Ai J, Gu L, Chen W, Liu Q. Two different concentrations of oxygen for culturing precompaction stage embryos on human embryo development competence: a prospective randomized sibling-oocyte study. Int J Clin Exp Pathol. 2014 Aug 15;7(9):6191-8. eCollection 2014.
Kasterstein E, Strassburger D, Komarovsky D, Bern O, Komsky A, Raziel A, Friedler S, Ron-El R. The effect of two distinct levels of oxygen concentration on embryo development in a sibling oocyte study. J Assist Reprod Genet. 2013 Aug;30(8):1073-9. doi: 10.1007/s10815-013-0032-z. Epub 2013 Jul 9.
Kea B, Gebhardt J, Watt J, Westphal LM, Lathi RB, Milki AA, Behr B. Effect of reduced oxygen concentrations on the outcome of in vitro fertilization. Fertil Steril. 2007 Jan;87(1):213-6. doi: 10.1016/j.fertnstert.2006.05.066. Epub 2006 Nov 1.
Kirkegaard K, Hindkjaer JJ, Ingerslev HJ. Effect of oxygen concentration on human embryo development evaluated by time-lapse monitoring. Fertil Steril. 2013 Mar 1;99(3):738-744.e4. doi: 10.1016/j.fertnstert.2012.11.028. Epub 2012 Dec 11.
Kovacic B, Vlaisavljevic V. Influence of atmospheric versus reduced oxygen concentration on development of human blastocysts in vitro: a prospective study on sibling oocytes. Reprod Biomed Online. 2008 Aug;17(2):229-36. doi: 10.1016/s1472-6483(10)60199-x.
Waldenstrom U, Engstrom AB, Hellberg D, Nilsson S. Low-oxygen compared with high-oxygen atmosphere in blastocyst culture, a prospective randomized study. Fertil Steril. 2009 Jun;91(6):2461-5. doi: 10.1016/j.fertnstert.2008.03.051. Epub 2008 Jun 12.
Wale PL, Gardner DK. Time-lapse analysis of mouse embryo development in oxygen gradients. Reprod Biomed Online. 2010 Sep;21(3):402-10. doi: 10.1016/j.rbmo.2010.04.028. Epub 2010 Aug 5.
Wale PL, Gardner DK. The effects of chemical and physical factors on mammalian embryo culture and their importance for the practice of assisted human reproduction. Hum Reprod Update. 2016 Jan-Feb;22(1):2-22. doi: 10.1093/humupd/dmv034. Epub 2015 Jul 22.
Other Identifiers
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2015-A02019-40
Identifier Type: -
Identifier Source: org_study_id
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