Serum Progesterone on the Day of Thawed Embryo Transfer and Pregnancy Rate After an Artificial Endometrial Preparation

Hillel Yaffe Medical Center

Status: Completed

Conditions: IVF

Treatments: Drug: Progesterone

Study type: Interventional

Funder types: Other

Identifiers

NCT04278508

0155-19-HYMC

Details and patient eligibility

About

To determine if different serum Progesterone levels on FET day are associated with different clinical pregnancy rates (CPR), and if increasing dosage of vaginal Progesterone in cases of lower serum Progesterone level on FET day can be either beneficial or detrimental regarding the CPR.

Full description

Over the past decade, the use of frozen-thawed embryo transfer (FET) has risen around the globe. There is no consensus which mode of FET is superior, either natural cycle (NC) or artificial cycle (AC) with hormonal replacement therapy (HRT). The latter has become more and more popular because it allows more flexibility in timing of FET and it requires fewer visits for monitoring before the transfer. AC also has the advantage of a more precise control of progesterone (P) exposure, which is of utmost importance for controlling the window of implantation between the embryo and the endometrium. Although FET in AC give excellent results, there is still a need for improvement, as the ideal dose is not individualized to a patient's characteristics and serum P required for optimal cycle outcome haven't been established.

Retrospective studies about P levels on the day of FET in AC cycles showed contradictory results regarding cycle outcomes. Several studies showed that a lower P levels on FET day, or one day prior, are associated with lower clinical pregnancy rate (CPR) or live birth rate (LBR), whereas one study showed that women with higher P on FET day were having lower LBRs. Recently, a prospective study showed that serum P level < 9.2 ng/ml on the day of FET in oocyte reception cycles was associated with a significant lower ongoing pregnancy rate. Considering these previous studies, we wanted to determine if different serum P levels on FET day are associated with different CPR, and if increasing dosage of vaginal P in cases of lower serum P level on FET day can be either beneficial or detrimental.

Enrollment: 38 patients

Sex: Female

Ages: 18 to 38 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• women between age 18-38 undergoing FET in AC
• with body mass index (BMI) < 35 kg/m2
• a triple layer endometrium >6.5 mm after exogenous estrogen administration
• 1-2 good quality day 3 or 5 FET.

Exclusion criteria

• women with recurrent pregnancy losses (e.g. 2 abortions beyond 12th week or 3 abortions before 12th week)
• recurrent implantation failure (e.g. unsuccessful implantation of ≥4 good quality embryos)
• severe male factor (sperm concentration <5 million/ml), or presence of hydrosalpinx.

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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38 participants in 3 patient groups

Group A

Active Comparator group

Description:

P \< 10.0 ng/ml with increasing P dosage from 800 mg to 1200 mg daily from the FET day.

Treatment:

Drug: Progesterone

Group B

Active Comparator group

Description:

P \< 10.0 ng/ml without change in drug regimen.

Treatment:

Drug: Progesterone

Group C

Active Comparator group

Description:

P ≥ 10.0 ng/ml without change in drug regimen.

Treatment:

Drug: Progesterone