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Group Culture May Affect Embryo Quality in Assisted Reproduction Technology

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04011319
Recruitment Status : Recruiting
First Posted : July 8, 2019
Last Update Posted : July 8, 2019
Information provided by (Responsible Party):
Tang-Du Hospital

Brief Summary:
One of the vital factors in achieving pregnancies in assisted reproductive technologies (ART) is maximizing embryo quality, which is significantly influenced by embryo culture conditions. A microwell culture system that facilitates group culture, improves embryonic development. The investigators use a new special culture dish to examine the effect of group culture on embryonic development in vitro. Zygotes derived from sibling oocytes were completely denuded from cumulus cells and spermatozoa, then randomly divided into conventional droplet culture or group culture. Embryos cultured in microwell system (group culture) were compared to conventional droplet culture (one zygote per drop). Relevant parameters are recorded to evaluate the validity of group culture in ART.

Condition or disease Intervention/treatment Phase
Embryo Quality Behavioral: group culture Not Applicable

Detailed Description:

Providing optimal culture conditions for the embryos in ART is crucial, due to its high impact on embryo development and thus on the pregnancy outcome. Several strategies have been proposed in order to improve embryo culture conditions and clinical pregnancy rates. Currently, the establishment of autocrine and paracrine communications and embryo-to-embryo interactions should contribute to the detoxification of the culture medium, facilitating embryo development and improving the implantation rate. Many studies have provided evidence related to the impact of group culture condition on the success of the embryonic development in animals. But the advantage of group culture to improve the embryonic development and pregnancy outcomes of ART in human remains elusive. Therefore, the investigator aim to discuss the effectiveness of group culture in ART.

In this study, zygotes derived from sibling oocytes were randomized 1:1 to either the microwell group culture (experiment group) or conventional droplet culture (control group). In experiment group, 4 zygotes cultured in a new special microwell (120 μl droplet were divided into 4 areas) with a corral dish (EMBC-010, LifeGlobal), embryos can communicate with each other in the same culture environment. In control group, single embryo individually cultured in a droplet (60 μl). Embryos were cultured in specific desktop three-gas incubators (COOK) of 37°C, 6% CO2 (carbon dioxide) , 5% O2 and 89% N2, and scored according to the criteria described in the ESHRE-ALPHA consensus. Consequently, exploitable embryos rate, good embryo quality, blastocyst formation rate were recorded. Other relevant parameters such as clinical pregnancy, live-birth or miscarriage were also recorded to evaluate the outcomes. Proper culture conditions can result in superior embryo viability, this research intends to discuss whether group culture can improve the embryo quality and clinical outcomes in ART.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 2000 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Group Culture May Affect Human Embryo Quality in Assisted Reproduction Technology
Actual Study Start Date : April 1, 2019
Estimated Primary Completion Date : March 2020
Estimated Study Completion Date : March 2020

Arm Intervention/treatment
No Intervention: convention culture
Each droplet separate culturing an individual embryo.
Experimental: group culture
Embryos were cultured in the same droplet.
Behavioral: group culture
Four embryos were cultured in the same droplet by a special dish.

Primary Outcome Measures :
  1. Efficacy of group culture on embryo potential [ Time Frame: 1 year ]
    Embryo potential was evaluated by the clinical pregnancy rate

Information from the National Library of Medicine

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Ages Eligible for Study:   22 Years to 40 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Patients undergoing IVF/ICSI cycle.
  • Number of oocytes≥ 8.

Exclusion Criteria:

  • Number of mature oocytes less than 6.
  • The number of normal fertilized zygotes less than 4.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04011319

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Contact: Ming Wang 8613259809290

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China, Shaanxi
Tangdu Hospital Recruiting
Xi'an, Shaanxi, China, 710038
Contact: Ming Wang         
Sponsors and Collaborators
Tang-Du Hospital
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Study Director: Bo Li Tang-Du Hospital
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Responsible Party: Tang-Du Hospital Identifier: NCT04011319    
Other Study ID Numbers: GCIEQ
First Posted: July 8, 2019    Key Record Dates
Last Update Posted: July 8, 2019
Last Verified: June 2019

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Tang-Du Hospital:
Group culture
Embryo quality
Implantation rate
Clinical pregnancy