Frozen Blastocyst Transfer Using Conventional Timing Versus Timing by Endometrial Receptivity Analysis (Synchrony)

Shady Grove Fertility Reproductive Science Center

Status: Unknown

Conditions: Implantation Failure; Infertility, Female

Treatments: Other: FET according to standard protocol; Other: FET according to ERA

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT03558399

1183343

Details and patient eligibility

About

To assess live birth after embryo transfer according to an individual's ERA results as opposed to routine protocol for frozen embryo transfer (FET) cycles.

Full description

It has been proposed, that the receptivity status of the endometrium shifts among individual women and that repeated implantation failure is ascribable to an endometrial factor in up to 25%. The endometrial receptivity analysis (ERA) is a diagnostic method that was developed based on the unique genomic signature of the endometrium during the window of implantation and classifies the endometrium as receptive, pre-receptive or post-receptive to guide embryo transfer.

The purpose of this assessor-blind, randomized clinical study is to determine whether live birth from vitrified/thawed euploid embryo transfer is improved when transfer is timed according to endometrial receptivity analysis (ERA) results.

Approximately 800 women (n=400 in each arm) will be enrolled according to the inclusion/exclusion criteria among patients of Shady Grove Fertility. Participants will undergo a standard in vitro fertilization (IVF) cycle, followed by preimplantation genetic screening (PGS) provided a high quality blastocyst is available. Participants with at least one PGS normal (euploid) embryo will be randomized (assigned by chance, like the flip of a coin) to one of two study groups. Women in both study arms will then undergo ERA testing and neither the patients nor their treating physicians will know to which group the women have been assigned to, or the ERA testing results. Up until this point there is no difference between the study and control group. The investigational aspect of this trial is described as follows: If the participant is assigned to the study arm, the single, euploid, frozen embryo transfer (FET) during the subsequent cycle will be performed at the time indicated by the ERA test results. If she is in the control arm, the embryo will be transferred according to our standard FET protocol.

Patients enrolling in the study will receive PGS and ERA free of charge.

Enrollment: 800 estimated patients

Sex: Female

Ages: 30 to 40 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Signed informed consent
2. Female age between 30 and 40 years and deemed likely by her physician, based on ovarian reserve testing, to produce at least one euploid blastocyst via one IVF/intracytoplasmatic sperm injection (ICSI) cycle
3. Having ≥ 1 euploid embryo available for embryo transfer
4. Standard eligibility criteria to undergo IVF and FET at Shady Grove Fertility Center.

Exclusion criteria

1. Known uterine factor impacting the endometrium
2. Use of surgically aspirated sperm for fertilization
3. Presence of any clinically relevant systemic disease that contraindicates assisted reproductive technology.
4. Since the subject last had a live birth (if any), there have been more than two embryo transfers that have not resulted in ongoing pregnancy
5. Body mass index >40 kg/m2 at screening
6. Recurrent pregnancy loss, defined as two or more clinical pregnancy losses without live birth
7. Planned testing of embryos for single gene disorder(s) or structural chromosome rearrangements
8. Currently breast feeding, pregnant, or contraindication to pregnancy

Trial design

Primary purpose: Diagnostic

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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800 participants in 2 patient groups

FET according to ERA

Experimental group

Description:

In preparation for frozen embryo transfer (FET), estradiol will be administered for approximately 10 to 14 days or until endometrial criteria are met. These endometrial criteria will be assessed with transvaginal ultrasound and serum estradiol levels. Women will then begin intramuscular progesterone injection and if assigned to the study arm, a single euploid embryo will be transferred at the time indicated by the ERA test results. Merely the timing of embryo transfer will distinguish the study from the control group.

Treatment:

Other: FET according to ERA

FET according to standard protocol

Active Comparator group

Description:

In preparation for frozen embryo transfer (FET), estradiol will be administered for approximately 10 to 14 days or until endometrial criteria are met. These endometrial criteria will be assessed with transvaginal ultrasound and serum estradiol levels. Women will then begin intramuscular progesterone injection and if assigned to the control arm, a single euploid embryo will be transferred according to our standard FET protocol.

Treatment:

Other: FET according to standard protocol