Long protocol probably leads to higher clinical pregnancies per woman randomised compared with short protocol (moderate certainty).
Long protocol showed no clear difference in clinical pregnancies per woman randomised compared with ultrashort protocol (low certainty).
Long protocol (GnRHa until HCG) showed no clear difference in clinical pregnancies per woman randomised compared with long protocol (extend GnRHa 12 days after HCG) (low certainty).
Long protocol continued GnRH agonist showed no clear difference in clinical pregnancies Number of clinical pregnancies per woman… compared with long protocol stop GnRH agonist (low certainty).
Long protocol (continued same showed no clear difference in clinical pregnancies per woman randomised compared with reduced dose GnRHa) (low certainty).
Long protocol: administration of GnRHa for two showed no clear difference in clinical pregnancies per woman randomised compared with three weeks before stimulation (low certainty).
Long luteal phase protocol showed no clear difference in clinical pregnancies per woman randomised compared with long follicular phase protocol (low certainty).