Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,510 questions · 2,653 findings · 194 reviews · Gynaecology and Fertility

No studies found 531 · 20%GRADE not reported 76 · 2.9%Very low 826 · 31.1%Low 855 · 32.2%Moderate 341 · 12.9%High 24 · 0.9%

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Live birth rate per woman · for controlled ovarian stimulation

Clomiphene citrate or letrozole with or without gonadotropins (with… showed no clear difference in live birth per woman compared with gonadotropins (with GnRH agonists or midcycle antagonist) (low certainty).

1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Mean number of gonadotropin ampoules used per woman · Women undergoing controlled ovarian stimulation in IVF and ICSI cycles (poor responders)
1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Mean number of oocytes retrieved per woman · Women undergoing controlled ovarian stimulation in IVF and ICSI cycles (poor responders)
1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Ovarian Hyperstimulation Syndrome rate per woman ‐ not reported · for controlled ovarian stimulation

Clomiphene citrate or letrozole with or without gonadotropins (with… may leads to lower ovarian hyperstimulation syndrome per woman compared with gonadotropins (with GnRH agonists or midcycle antagonist) (low certainty).

1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Clinical pregnancy rate · for controlled ovarian stimulation

Clomiphene citrate or letrozole with or without gonadotropins (with… showed no clear difference in clinical pregnancy rate per woman compared with gonadotropins (with GnRH agonists or midcycle antagonist) (moderate certainty).

1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Cancellation rate per woman · for controlled ovarian stimulation

Clomiphene citrate or letrozole with or without gonadotropins (with… may leads to higher cancellation rate per woman compared with gonadotropins (with GnRH agonists or midcycle antagonist) (low certainty).

1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Live birth rate per woman · Women undergoing controlled ovarian stimulation in IVF and ICSI cycles (poor responders)

Clomiphene citrate or letrozole with or without gonadotropins (with… showed no clear difference in live birth per woman compared with gonadotropins (with GnRH agonist or midcycle antagonist) (low certainty).

1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Clinical pregnancy rate · Women undergoing controlled ovarian stimulation in IVF and ICSI cycles (poor responders)

Clomiphene citrate or letrozole with or without gonadotropins (with… showed no clear difference in clinical pregnancy rate per woman compared with gonadotropins (with GnRH agonist or midcycle antagonist) (low certainty).

1 finding from 1 review

Clomiphene citrate or letrozole with or without gonadotropins (with or without midcycle antagonist) vs gonadotropins (with GnRH agonists or midcycle antagonist)

Cancellation rate per woman · Women undergoing controlled ovarian stimulation in IVF and ICSI cycles (poor responders)

Clomiphene citrate or letrozole with or without gonadotropins (with… may leads to higher cancellation rate per woman compared with gonadotropins (with GnRH agonist or midcycle antagonist) (low certainty).

1 finding from 1 review