About this trial
To evaluate the efficacy and safety of metformin pretreatment on reproductive outcomes in infertile women with prediabetes.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Women who are diagnosed with prediabetes by ADA criteria, including either IFG, IGT, or HbA1C 5.7-6.4%.
Women aged 20-40 years.
Women who plan to undergo a new cycle of IVF, ICSI, or PGT-A.
Disqualifiers
Women who are diagnosed with diabetes according to the ADA criteria11,12, which is meeting one of the following criteria: fasting plasma glucose ≥7.0mmol/L, 2-h plasma glucose during 75-g OGTT ≥11.1mmol/L, HbA1c≥6.5%, or a random plasma glucose≥11.1mmol/L.
Women who are taking medicine that interfere with glucose metabolism, such as metformin, oral anti-diabetic agents (sulfonylureas, glinides, thiazolidinediones, α-glycosidase inhibitors, GLP-1 receptor agonist, etc.), weight loss drugs (i.e.orlistat, etc.), glucocorticoids, and growth hormones within 2 months before enrollment.
Women with un-corrected hyperthyroidism or hypothyroidism.
Women with congenital or acquired abnormal uterine cavity including septate uterus, unicornous uterus, uterus duplex, and intrauterine adhesions.
Trial design
Factorial
Treatments tested in this trial
Metformin pretreatment before ovarian stimulation
DrugThe enrolled patients will be prescribed metformin 850mg twice daily for at least 4 weeks prior to ovarian stimulation till oocyte retrieval.
Placebo pretreatment before ovarian stimulation
DrugThe enrolled patients will be prescribed placebo 850mg twice daily for at least 4 weeks prior to ovarian stimulation till oocyte retrieval.
Metformin pretreatment before endometrial preparation for frozen embryo transfer
DrugAfter oocyte retrieval, the enrolled patients will be prescribed metformin 850mg twice daily for at least 4 weeks before endometrial preparation for frozen embryo transfer and till the establishment of clinical pregnancy (7-8 weeks gestation) after the first frozen embryo transfer.
Placebo pretreatment before endometrial preparation for frozen embryo transfer
DrugAfter oocyte retrieval, the enrolled patients will be prescribed placebo 850mg twice daily for at least 4 weeks before endometrial preparation for frozen embryo transfer and till the establishment of clinical pregnancy (7-8 weeks gestation) after the first frozen embryo transfer.
Treatment groups
Trial outcomes
Primary outcomes
healthy live birth
defined as a singleton live birth at ≥37 weeks, with infant birth weight between 2500 and 4000g and without a major congenital anomaly.
Secondary outcomes
Change in BMI
change in body mass index (BMI) from baseline to the establishment of clinical pregnancy.
Change in fasting glucose level
change in fasting glucose level from baseline to the establishment of clinical pregnancy.
Change in fasting insulin level
change in fasting insulin level from baseline to the establishment of clinical pregnancy.
Change in 2-h levels of glucose after 75-g OGTT
change in 2-h levels of glucose after 75-g OGTT from baseline to the establishment of clinical pregnancy.
Sponsors and contacts
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Shandong University
Lead sponsor
Ren Ji Hospital of Shanghai Jiao Tong University
Collaborator
Women's Hospital of Zhejiang University
Collaborator
Shengjing Hospital
Collaborator
Nanjing Medical University
Collaborator
General Hospital of Ningxia Medical University
Collaborator
West China Second University Hospital
Collaborator
Henan Provincial Maternal and Child Health Care Hospital
Collaborator
Qingdao women's and children's Hospital
Collaborator