Findings

What do systematic reviews say?

2 questions · 2 findings · 2 reviews

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 2 · 100%High 0 · 0%

GnRH antagonist vs long‐course GnRH agonist

Clinical pregnancy rate · women undergoing assisted reproductive technology (ART)

GnRH antagonist showed no clear difference in clinical pregnancy rate per woman randomised compared with long‐course GnRH agonist (moderate certainty).

1 finding from 1 review

Gonadotrophin‐releasing hormone antagonists for assisted reproductive technology 2016 · Cochrane Headline outcomes only
OR 0.91 [0.83, 1]
54 studies · 9959 participants
Moderate

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

Oral medications including clomiphene citrate or aromatase inhibitors with gonadotropins for controlled ovarian… 2017 · Cochrane Headline outcomes only
RR 1 [0.86, 1.16]
12 studies · 1998 participants
Moderate