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. 2023 Aug 9;13(8):e069840. doi: 10.1136/bmjopen-2022-069840

Table 1.

Schedule of the study process

Time point Study period
Enrolment Allocation Post-allocation
Precycle IVF/ICSI-ET Follow-up
Days 2–4 in Follicular phase Day 7 after ovulation MC day 1–3 Trigger day OPU Embryo transfer 14 days after embryo transfer 12 weeks after embryo transfer
Enrolment
 Eligibility screen √ √
 Informed consent √
 Randomisation √
 Allocation √
Interventions
 Oestrogen pretreatment graphic file with name bmjopen-2022-069840ilf01.jpg
 GnRH-ant protocol graphic file with name bmjopen-2022-069840ilf02.jpg
 Luteal support graphic file with name bmjopen-2022-069840ilf03.jpg
Assessments
 Baseline data √
 Primary Outcome √
 Secondary outcome √ √ √ √ √

Precycle, the oestrogen-priming menstrual cycle preceding the IVF/ICSI-ET.

GnRH-ant, gonadotrophin releasing hormone antagonist; IVF/ICSI-ET, in vitro fertilisation/intracytoplasmic sperm injection-embryo transfer; MC, menstrual cycle; OPU, oocyte pick-up.