Table 1.

ProFET trial inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
Natural cycle FET with blastocyst	Oocyte donor cycles
Regular menstrual cycle (24–35 days)	Uterine malformations: cervical anomalies, submucosal uterine fibroid or endometrial polyps requiring surgery.
Age 18–43 years	Hypersensitivity to vaginal progesterone
BMI 18.5–35 (kg/m2)	Medical contraindication to progesterone treatment
Understand written and spoken Swedish, English or Arabic and have signed a written informed consent.	Serious concomitant disease contraindicating ART and pregnancy
	Preimplantation genetic testing
	Previously included in the ProFET study
	Participation in another study with an investigational product within the last 30 days

ART, assisted reproductive technology; BMI, Body mass index; FET, Frozen embryo transfer.