Gap finder

Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

2,653 questions in 194 reviews · Gynaecology and Fertility

current versions
No studies 531 · 20%Ungraded 76 · 2.9%Very low 826 · 31.1%Low 855 · 32.2%Moderate 341 · 12.9%High 24 · 0.9%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Misoprostol vs placebo or no treatment before operative hysteroscopy
Side effects · Pre and post menopausal women
Preoperative ripening of the cervix before operative hysteroscopy (2015) · Cochrane
OR 2.59 [1.15, 5.79]4 studies · 272 participantsModerate
Misoprostol vs dinoprostone before operative hysteroscopy
Ease of dilatation: need for mechanical dilatation · Pre and post menopausal women
Preoperative ripening of the cervix before operative hysteroscopy (2015) · Cochrane
OR 0.58 [0.34, 0.98]1 study · 310 participantsLow
Misoprostol vs dinoprostone before operative hysteroscopy
Intraoperative complications · Pre and post menopausal women
Preoperative ripening of the cervix before operative hysteroscopy (2015) · Cochrane
OR 0.32 [0.12, 0.83]1 study · 310 participantsLow
Topical anaesthetic vs placebo or no treatment
Mean Pain Score During HSG VAS Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted9 studies · 613 participantsLow
Locally injected anaesthetics vs placebo or no treatment
Mean Pain Score During HSG Visual analogue scale · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted2 studies · 125 participantsLow
Locally injected anaesthetics vs placebo or no treatment
Mean Pain Score Less Than 30 minutes After HSG Visual analogue scale · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted2 studies · 125 participantsLow
Opioid vs non‐opioid analgesics
Mean Pain Score During HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 91 participantsLow
Opioid vs non‐opioid analgesics
Mean Pain Score Less Than 30 minutes After HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 91 participantsLow
Opioid vs non‐opioid analgesics
Mean Pain Score More Than 30 minutes After HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 91 participantsLow
Topical anaesthetic vs paracervical block
Mean Pain Score During HSG Visual analogue scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 20 participantsModerate
Topical anaesthetic vs paracervical block
Mean Pain Score Less Than 30 minutes After HSG Visual analogue scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 20 participantsLow
Topical anaesthetic vs paracervical block
Mean Pain Score More Than 30 minutes After HSG Visual analogue scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 20 participantsLow
Topical anaesthetic vs non‐opioid analgesics
Mean pain score within 30 minutes after HSG Visual analogue scale · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 100 participantsVery low
Topical anaesthetic vs non‐opioid analgesics
Mean pain score more than 30 minutes after HSG Visual analogue scale · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 100 participantsVery low
Topical anaesthetic vs placebo or no treatment
Mean Pain Score Less Than 30 minutes After HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted5 studies · 373 participantsVery low
Topical anaesthetic vs placebo or no treatment
Mean Pain Score More Than 30 minutes After HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted2 studies · 166 participantsVery low
Oral opioid analgesics vs placebo or no treatment
Mean Pain Score During HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 128 participantsLow
Oral opioid analgesics vs placebo or no treatment
Mean Pain Score More Than 30 minutes After HSG Visual analogue scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 128 participantsModerate
Intravenous opioid analgesics vs placebo or no treatment
Mean Pain Score During HSG Visual analogue scale (10 cm) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted1 study · 62 participantsModerate
Oral non‐opioid analgesics vs placebo or no treatment
Pain Score During HSG Visual analogue scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted3 studies · 133 participantsLow
Oral non‐opioid analgesics vs placebo or no treatment
Pain Score Less Than 30 minutes After HSG Visual analogue scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted2 studies · 45 participantsVery low
Oral non‐opioid analgesics vs placebo or no treatment
Mean Pain Score More Than 30 minutes After HSG Visual analogue Scale (0 to 10) · Women being investigated for infertility
Pain relief in hysterosalpingography (2015) · Cochrane
no estimate extracted3 studies · 133 participantsLow
Long protocol vs short protocol
Live birth or ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.3 [0.94, 1.81]12 studies · 976 participantsLow
Long protocol continued GnRH agonist vs long protocol stop GnRH agonist
Clinical pregnancies Number of clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 0.85 [0.51, 1.41]4 studies · 360 participantsLow
Long protocol (continued same vs reduced dose GnRHa)
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
no estimate extractedNRNo studies
Long protocol (continued same vs reduced dose GnRHa)
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.02 [0.68, 1.52]4 studies · 407 participantsLow
Long protocol (GnRHa until HCG) vs long protocol (extend GnRHa 12 days after HCG)
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 0.89 [0.49, 1.64]1 study · 181 participantsLow
Long protocol (GnRHa until HCG) vs long protocol (extend GnRHa 12 days after HCG)
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.02 [0.57, 1.83]1 study · 181 participantsLow
Long protocol: administration of GnRHa for two vs three weeks before stimulation
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 0.88 [0.37, 2.05]1 study · 85 participantsLow
Long protocol: administration of GnRHa for two vs three weeks before stimulation
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 0.93 [0.39, 2.21]1 study · 85 participantsLow
Short protocol vs stop short protocol
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
no estimate extractedNRNo studies
Short protocol vs stop short protocol
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 0.59 [0.3, 1.17]1 study · 230 participantsLow
Long protocol vs short protocol
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.5 [1.18, 1.9]20 studies · 1643 participantsModerate
Long protocol vs ultrashort protocol
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.78 [0.72, 4.36]1 study · 150 participantsLow
Long protocol vs ultrashort protocol
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.56 [0.8, 3.06]2 studies · 230 participantsLow
Short vs ultrashort protocol
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
no estimate extractedNRNo studies
Short vs ultrashort protocol
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.33 [0.47, 3.81]1 study · 82 participantsVery low
Long luteal phase protocol vs long follicular phase protocol
Live birth and ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.89 [0.87, 4.1]1 study · 223 participantsLow
Long luteal phase protocol vs long follicular phase protocol
Clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 1.06 [0.76, 1.47]5 studies · 750 participantsLow
Long protocol continued GnRH agonist vs long protocol stop GnRH agonist
Live birth and ongoing pregnancies Number of live births or ongoing pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction
Gonadotrophin‐releasing hormone agonist protocols for pituitary suppression in assisted reproduction (2015) · Cochrane
OR 0.75 [0.42, 1.33]3 studies · 290 participantsLow
Intervention NR
Comparisons** · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Early embryo transfer ‐ GM501 (specific) versus ISMI (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 1.03 [0.53, 2.03]1 study · 172 participantsVery low
Intervention NR
Early embryo transfer ‐ GM501 (specific) versus Sydney IVF (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 0.87 [0.38, 1.96]1 study · 158 participantsVery low
Intervention NR
Early embryo transfer ‐ G2 (specific) versus Universal IVF (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 1.53 [0.67, 3.51]1 study · 129 participantsVery low
Intervention NR
Early embryo transfer: Cook (K‐SIFM or K‐SICM) (specific) versus Vitrolife (IVF or G3) (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 0.98 [0.63, 1.54]1 study · 449 participantsLow
Intervention NR
Early embryo transfer ‐ G2 (specific) versus Ham's F10 (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 1.52 [0.58, 3.99]1 study · 72 participantsVery low
Intervention NR
Late embryo transfer ‐ GM501 (specific) versus Sydney IVF (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 0.67 [0.03, 14.03]1 study · 12 participantsVery low
Intervention NR
Late embryo transfer ‐ G2 (specific) versus Universal IVF (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 1.92 [0.44, 8.31]1 study · 47 participantsVery low
Intervention NR
Late embryo transfer ‐ ECM/Multiblast (specific) versus Global (other) · Women in assisted reproductive technology cycles (ART) receiving human pre‐implantation embryos in either early…
Culture media for human pre‐implantation embryos in assisted reproductive technology cycles (2015) · Cochrane
OR 0.5 [0.2, 1.26]1 study · 79 participantsVery low
hCG vs placebo/no treatment
Live birth or ongoing pregnancy · subfertile women
Luteal phase support for assisted reproduction cycles (2015) · Cochrane
OR 1.76 [1.08, 2.86]3 studies · 527 participantsVery low