Live Birth Rate Between PPOS and GnRH Antagonist Protocol in Patients With Anticipated High Ovarian Response

  • End date
    Oct 1, 2024
  • participants needed
  • sponsor
    ShangHai Ji Ai Genetics & IVF Institute
Updated on 19 April 2022
gnrh antagonist
ovarian stimulation
antral follicle count
medroxyprogesterone 10 mg


Progestin can inhibit the pituitary LH surge during ovarian stimulation and various studies show progestin-primed ovarian stimulation (PPOS) is effective in blocking the LH surge in IVF. More and more centers in China are using PPOS because this regimen appears simpler and cheaper.A randomized trial to compare the effectiveness of PPOS and GnRH antagonist protocol in IVF in terms of the live birth rate is urgently needed.

Trial objectives: To compare the live birth rate between the PPOS protocol and the antagonist protocol used for ovarian stimulation during IVF

Eligible women will be randomised into one of the two groups:

Antagonist group : Women will receive antagonist (Cetrorelix or Ganirelix 0.25mg) once subcutaneously daily from day 6 of ovarian stimulation till the day of the ovulation trigger.

PPOS group: Women will receive oral medroxyprogesterone 10 mg daily or duphaston 10mg bd daily from Day 3 till the day of ovulation trigger.

There will be no fresh transfer. Only one blastocyst will be allowed to replaced in the first FET and a maximum of two blastocysts will be replaced in the subsequent FET cycles.

The primary outcome is the live birth rate of the first frozen-thawed transfer cycle.

Condition IVF, GnRH Antagonist, PPOS
Treatment progesterone, GnRH antagonist
Clinical Study IdentifierNCT04414761
SponsorShangHai Ji Ai Genetics & IVF Institute
Last Modified on19 April 2022


Yes No Not Sure

Inclusion Criteria

Age of women <43 years at the time of ovarian stimulation for IVF
The first IVF cycle
Antral follicle count (AFC) >15 on day 2-5 of the period

Exclusion Criteria

Presence of a functional ovarian cyst with E2>100 pg/mL
Recipient of oocyte donation
Undergoing preimplantation genetic testing
Presence of hydrosalpinx or endometrial polyp which is not surgically treated
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note