Effectiveness of herb-partitioned moxibustion on the navel for pregnancy outcomes in patients with recurrent implantation failure undergoing in vitro fertilization and embryo transfer: a study protocol for a randomized controlled trial

Table 1 Schedule of the study process (SPIRIT figure)

	Study period
	Enrollment	Post allocation
Timepoint	1st visit	1st MC	2nd MC	3rd MC	4th MC	14 days after FET	3 months after FET
Enrollment:
Eligibility screen	√
Informed consent	√
Allocation	√
Interventions:
Herb-partitioned moxibustion on the navel		√	√	√
Artificial cycle					√
Assessments:
Serum estrogen					√	√	√
Serum progesterone					√	√	√
Ultrasonography	√	√	√	√	√	√	√
Pregnancy test					√	√
Pregnancy outcome					√	√	√
Telephone follow-up						√	√

ISSN: 1745-6215