Progesterone-modified Natural Cycle for FET

Trial statusRecruiting
Trial phasePhase 3
Trial typeInterventional
Biological sexFemale
Age21-44
SponsorShandong University of Traditional Chinese Medicine

About this trial

Hormone replacement therapy (HRT) cycles, despite the ease of synchronizing embryo thawing and embryo transfer timing, increase the risk of pregnancies and obstetric complications compared to natural cycles (NC). By ensuring the presence of the corpus luteum while reducing the number of monitoring sessions, the progesterone modified natural cycle (P4mNC) offers more convenience for the patient than the normal NC. This study is designed to compare the effects of P4mNC and HRT cycles on FET outcomes.

Eligibility criteria

Qualifiers

Patients aged 21 to 44 years undergoing FBT

Body mass index (BMI) 18-35 kg/m2

Having regular ovulatory cycles

Disqualifiers

Untreated uterine adhesions

Medical contraindications to estrogen and progesterone therapy

Illnesses contraindicating assisted reproductive technology or pregnancy

History of recurrent implantation failures (> 2 embryo transfer failures)

Trial design

Treatments tested in this trial

  • Progesterone-modified natural cycle preparation for frozen embryo transfer
  • Hormone replacement therapy cycle preparation for frozen embryo transfer

Treatment groups

336 Participants
are divided into 2 treatment groups