Infertility Clinical Trial
Official title:
A Randomised Controlled Trial of Natural Versus Hormone Replacement Therapy Cycles in Frozen Embryo Replacement IVF: a Pilot Study
Frozen Embryo Replacement (FER)is a fertility treatment by which stored embryos from a fresh
IVF treatment cycle are thawed and transferred into the uterus. Frozen embryos can be
replaced either in the middle of a natural menstrual cycle (Natural FER) or in a cycle where
the woman takes drugs to suppress her own hormones, and then takes Hormone Replacement
Therapy (HRT) to prepare her uterus for the transfer of embryos(HRT − FER).
Both are widely used methods of fertility treatment. However, to date no well designed
studies have been reported in which the two methods have been compared. This study aims to
compare the two treatments in order to establish the best treatment protocol.
The study design is a single centre open randomized controlled trial funded by the Oxford
Fertility Unit.
100 women who are considering FER treatment at the Oxford Fertility Unit and are eligible
for the study will be recruited.
After giving their written consent they will be randomised to one of 2 groups: Natural FER
and HRT FER.
Patients in both groups will be asked to attend one initial visit, which is additional to
patients not taking part in the study.
Subsequent visits will depend on the treatment group but will not be additional for study
participants. All visits requiring ultrasound will involve recording 3−D measurements, which
increases the length of each visit by approximately 10 minutes. A patient satisfaction
questionnaire would be completed at the end of the cycle.
A urinary pregnancy test is performed at home 2 weeks following the embryo transfer visit.
If this is positive then further visits to the unit are arranged to confirm the clinical
pregnancy.
Inclusion in the study would not increase the length of time of either treatment cycle.
Follow up would extend to obtaining pregnancy outcome information.
Status | Completed |
Enrollment | 159 |
Est. completion date | May 2013 |
Est. primary completion date | May 2013 |
Accepts healthy volunteers | No |
Gender | Female |
Age group | 18 Years to 40 Years |
Eligibility |
Inclusion Criteria: - Women attending Oxford Fertility Unit planning a frozen embryo replacement cycle. - Willing and able to give informed consent for participation in the study. - Age at original fresh IVF cycle < 40 years old. - At least 3 embryos frozen in storage - First or second FER cycle - Regular ovulatory menstrual cycles, confirmed by luteal progesterone levels >16nmol/L and with cycle length < 35 days. Exclusion Criteria: - Women with irregular cycles (outlined above), including amenorrhoea or oligomenorrhoea. - Co-existing medical illness including renal, cardiac and liver disease - Women for whom the study medication(s) are contraindicated or who have known allergic reactions to study medication(s) - Women who have already taken part in this trial (i.e. cannot have more than one treatment cycle as a participant in this trial) |
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
United Kingdom | Nuffield Department of Obstetrics and Gynaecology, University of Oxford | Oxford | Oxfordshire |
United Kingdom | Oxford Fertility Unit | Oxford | Oxfordshire |
Lead Sponsor | Collaborator |
---|---|
University of Oxford | Oxford Fertility Unit |
United Kingdom,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | The live birth rate in each group | 22 - 40 weeks following embryo transfer | No | |
Secondary | Clinical pregnancy rates (CPR) | 4 weeks after embryo transfer (at 6/40 pregnancy) | No | |
Secondary | Implantation rate (defined as the number gestational sacs visible on ultrasound divided by the number of embryos replaced and expressed in percentage) | 4 weeks following embryo transfer (6/40 pregnancy) | No | |
Secondary | 3D endometrial volume and blood flow indices | various from day 1 to embryo transfer | No | |
Secondary | Patient satisfaction with treatment | 4-10 weeks (at embryo transfer) | No |
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