The Effect of Heparin in Treatment IVF-ET Failure
Embryo transfer failure is defined as ≥3 IVF-embryo transfer failures without pregnancy . In spite of transfer of 3 good quality embryos , just 20-30% of women undergoing IVF will achieve ongoing pregnancy . There are multiple factors that influence IVF-failure.
Autoantibodies may be one of the possible causes of IVF-failure , especially in unexplained and mechanical infertility .
In some studies , antiphospholipid antibody is considered as causative factor on implantation and embryo failure. However some investigators showed that combination therapy with heparin/aspirin in women with positive antiphospholipid antibody is not effective in improving of IVF-outcome . In prospective studies were not confirmed association between antiphospholipid antibody abnormalities and IVF-failure.
Recently has been relationship between thrombophilia and IVF and implantation failure.
The effect of unfractionated heparin in assisted reproductive technology (ART) cycles is prevention of thrombosis in implantation site . Although its effect is not restricted to anticoagulation and also can modulate apposition , adhesion , and penetration of embryo . Other advantages are decreasing thrombophilic risk in COH ( controlled ovarian hyperstimulation) cycles with administration of gonadotrophins . So heparin make better pregnancy rate in repeated IVF-ET failures.
There are few studies in regard to heparin effects on IVF cycles outcome . The purpose of this study is evaluation of unfractionated heparin effects on improvement of ART outcome .
This study was a prospective randomized controlled trial to assess whether administration of heparin would increased pregnancy rates in women with repeated ET-IVF failures.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Investigator)
Primary Purpose: Treatment
|Official Title:||the Effect of Unfractionated Heparin in Treatment of IVF-ET Failure|
- chemical pregnancy rate [ Time Frame: until 12th gestational week ] [ Designated as safety issue: No ]
- clinical pregnancy rate [ Time Frame: until 12 gastational week ] [ Designated as safety issue: No ]
|Study Start Date:||May 2009|
|Study Completion Date:||June 2010|
|Primary Completion Date:||September 2009 (Final data collection date for primary outcome measure)|
Experimental: heparin,pregnancy,IVF failure
Women in the heparin arm are administered 5000 IU twice a day on the day of embryo transfer
5000 IU subcutaneously in the day of embryo transfer until 6 week after delivery
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|Iran, Islamic Republic of|
|Yazd Research and Clinical Centre for Infertility|
|Yazd, Iran, Islamic Republic of, 8916877391|
|Principal Investigator:||Mehri Mashayekhy, infertility fellowship||Yazd Research and Clinical Centre for Infertility|