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Ozljeda endometrija za povećanje mogućnosti trudnoće nakon spolnog odnosa ili medicinski potpomognute oplodnje postupkom inseminacije

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Appendices

Appendix 1. Cochrane Gynaecology and Fertility Group Specialised Register search strategy

PROCITE platform

From inception until 29.10.15

Keywords CONTAINS "Intrauterine Insemination" or "IUI" or "artificial insemination" or "expectant management" or "intercourse" or "coitus" or Title CONTAINS "Intrauterine Insemination" or "IUI" or "artificial insemination" or "expectant management" or "intercourse" or "coitus" AND Keywords CONTAINS "endometrial biopsy"or "endometrial injury"or"endometrial trauma"or "mock embryo transfer" or "endometrial sampling"or "endometrial local injury"or "endometrial priming" or Title CONTAINS "endometrial biopsy"or "endometrial injury"or"endometrial trauma"or "mock embryo transfer" or "endometrial sampling"or "endometrial local injury"or "endometrial priming" (70)

Appendix 2. CENTRAL search strategy

Ovid platform

From inception until 29.10.15

1 exp insemination, artificial/ or exp insemination, artificial, heterologous/ or exp insemination, artificial, homologous/ (296)
2 artificial insemination.tw. (98)
3 intrauterine insemination.tw. (500)
4 IUI.tw. (398)
5 intercourse.tw. (1195)
6 ovulation induction.tw. (544)
7 coitus.tw. (95)
8 exp Infertility/ (1668)
9 subfertil$.tw. (203)
10 pregnanc$.tw. (13832)
11 or/1‐10 (16030)
12 (endometri$ adj3 sampl$).tw. (181)
13 (endometri$ adj3 biops$).tw. (480)
14 (endometri$ adj3 scratch$).tw. (6)
15 (endometri$ adj3 injur$).tw. (27)
16 pipelle.tw. (64)
17 local injury.tw. (23)
18 (endometri$ adj5 trauma$).tw. (4)
19 (endometri$ adj5 harm$).tw. (1)
20 (endometri$ adj5 damag$).tw. (8)
21 (endometri$ adj5 inflammation).tw. (5)
22 (endometri$ adj5 wound$).tw. (61)
23 (endometri$ adj5 lesion$).tw. (70)
24 (endometri$ adj5 insult$).tw. (0)
25 (mock adj3 transfer$).tw. (5)
26 (endometri$ adj3 stimul$).tw. (105)
27 (endometri$ adj3 prim$).tw. (67)
28 or/12‐27 (876)
29 11 and 28 (145)

Appendix 3. MEDLINE search strategy

Ovid platform

From inception until 29.10.15

1 exp insemination, artificial/ or exp insemination, artificial, heterologous/ or exp insemination, artificial, homologous/ (10413)
2 artificial insemination.tw. (5293)
3 intrauterine insemination.tw. (1919)
4 IUI.tw. (1329)
5 intercourse.tw. (16057)
6 ovulation induction.tw. (3083)
7 coitus.tw. (2590)
8 exp Infertility/ (56134)
9 subfertil$.tw. (3927)
10 pregnanc$.tw. (330376)
11 or/1‐10 (398545)
12 (endometri$ adj3 sampl$).tw. (2417)
13 (endometri$ adj3 biops$).tw. (3772)
14 (endometri$ adj3 scratch$).tw. (23)
15 (endometri$ adj3 injur$).tw. (103)
16 pipelle.tw. (209)
17 local injury.tw. (374)
18 (endometri$ adj5 trauma$).tw. (90)
19 (endometri$ adj5 harm$).tw. (26)
20 (endometri$ adj5 damag$).tw. (189)
21 (endometri$ adj5 inflammation).tw. (329)
22 (endometri$ adj5 wound$).tw. (174)
23 (endometri$ adj5 lesion$).tw. (2781)
24 (endometri$ adj5 insult$).tw. (4)
25 (mock adj3 transfer$).tw. (42)
26 (endometri$ adj3 stimul$).tw. (790)
27 (endometri$ adj3 prim$).tw. (1618)
28 or/12‐27 (11373)
29 11 and 28 (2103)
30 randomized controlled trial.pt. (415041)
31 controlled clinical trial.pt. (91985)
32 randomized.ab. (336476)
33 randomised.ab. (68617)
34 placebo.tw. (173735)
35 clinical trials as topic.sh. (179555)
36 randomly.ab. (242878)
37 trial.ti. (148303)
38 (crossover or cross‐over or cross over).tw. (66278)
39 or/30‐38 (1051606)
40 exp animals/ not humans.sh. (4137311)
41 39 not 40 (969497)
42 29 and 41 (217)

Appendix 4. EMBASE search strategy

OVID platform

From inception until 29.10.15

1 exp artificial insemination/ (13034)
2 artificial insemination.tw. (5054)
3 intrauterine insemination.tw. (2703)
4 IUI.tw. (2290)
5 intercourse.tw. (19013)
6 ovulation induction.tw. (4146)
7 coitus.tw. (2495)
8 exp Infertility/ (97346)
9 subfertil$.tw. (4961)
10 pregnanc$.tw. (393427)
11 (endometri$ adj3 sampl$).tw. (3271)
12 (endometri$ adj3 biops$).tw. (4964)
13 (endometri$ adj3 scratch$).tw. (47)
14 (endometri$ adj3 injur$).tw. (167)
15 pipelle.tw. (398)
16 local injury.tw. (461)
17 (endometri$ adj5 trauma$).tw. (102)
18 (endometri$ adj5 harm$).tw. (51)
19 (endometri$ adj5 damag$).tw. (260)
20 (endometri$ adj5 inflammation).tw. (433)
21 (endometri$ adj5 wound$).tw. (220)
22 (endometri$ adj5 lesion$).tw. (3941)
23 (endometri$ adj5 insult$).tw. (6)
24 (mock adj3 transfer$).tw. (70)
25 (endometri$ adj3 stimul$).tw. (993)
26 (endometri$ adj3 prim$).tw. (2108)
27 or/1‐10 (496718)
28 or/11‐26 (15089)
29 27 and 28 (3285)
30 Clinical Trial/ (852134)
31 Randomized Controlled Trial/ (386850)
32 exp randomization/ (68548)
33 Single Blind Procedure/ (21172)
34 Double Blind Procedure/ (124394)
35 Crossover Procedure/ (44827)
36 Placebo/ (264947)
37 Randomi?ed controlled trial$.tw. (125572)
38 Rct.tw. (18572)
39 random allocation.tw. (1460)
40 randomly allocated.tw. (23491)
41 allocated randomly.tw. (2066)
42 (allocated adj2 random).tw. (739)
43 Single blind$.tw. (16493)
44 Double blind$.tw. (155737)
45 ((treble or triple) adj blind$).tw. (496)
46 placebo$.tw. (222385)
47 prospective study/ (311493)
48 or/30‐47 (1514482)
49 case study/ (34294)
50 case report.tw. (292773)
51 abstract report/ or letter/ (941827)
52 or/49‐51 (1262329)
53 48 not 52 (1474450)
54 29 and 53 (446)

Appendix 5. PsycINFO search strategy

OVID Platform

From inception until 29.10.15

1 exp Reproductive Technology/ (1519)
2 artificial insemination.tw. (235)
3 intrauterine insemination.tw. (19)
4 IUI.tw. (26)
5 intercourse.tw. (8063)
6 ovulation induction.tw. (19)
7 coitus.tw. (778)
8 exp Infertility/ (1837)
9 subfertil$.tw. (69)
10 pregnanc$.tw. (30684)
11 or/1‐10 (40989)
12 (endometri$ adj3 sampl$).tw. (4)
13 (endometri$ adj3 biops$).tw. (15)
14 (endometri$ adj3 scratch$).tw. (0)
15 (endometri$ adj3 injur$).tw. (1)
16 pipelle.tw. (0)
17 local injury.tw. (25)
18 (endometri$ adj5 trauma$).tw. (2)
19 (endometri$ adj5 harm$).tw. (0)
20 (endometri$ adj5 damag$).tw. (3)
21 (endometri$ adj5 inflammation).tw. (1)
22 (endometri$ adj5 wound$).tw. (0)
23 (endometri$ adj5 lesion$).tw. (13)
24 (endometri$ adj5 insult$).tw. (0)
25 (mock adj3 transfer$).tw. (0)
26 (endometri$ adj3 stimul$).tw. (4)
27 (endometri$ adj3 prim$).tw. (6)
28 or/12‐27 (69)
29 11 and 28 (7)
30 random.tw. (45128)
31 control.tw. (349729)
32 double‐blind.tw. (19333)
33 clinical trials/ (9139)
34 placebo/ (4286)
35 exp Treatment/ (633786)
36 or/30‐35 (972934)
37 29 and 36 (3)

Appendix 6. CINAHL search strategy

EBSCO Platform

From inception until 29.10.15

#

Query

Results

S43

S28 AND S42

62

S42

S29 OR S30 or S31 or S32 OR S33 OR S34 OR S35 OR S36 OR S37 OR S38 OR S39 OR S40 OR S41

893,293

S41

TX allocat* random*

3,912

S40

(MH "Quantitative Studies")

12,084

S39

(MH "Placebos")

8,756

S38

TX placebo*

31,642

S37

TX random* allocat*

3,912

S36

(MH "Random Assignment")

37,333

S35

TX randomi* control* trial*

73,395

S34

TX ( (singl* n1 blind*) or (singl* n1 mask*) ) or TX ( (doubl* n1 blind*) or (doubl* n1 mask*) ) or TX ( (tripl* n1 blind*) or (tripl* n1 mask*) ) or TX ( (trebl* n1 blind*) or (trebl* n1 mask*) )

717,399

S33

TX ( (trebl* n1 blind*) or (trebl* n1 mask*) )

105

S32

TX ( (trebl* n1 blind*) or (trebl* n1 mask*) )

0

S31

TX clinic* n1 trial*

163,636

S30

PT Clinical trial

76,052

S29

(MH "Clinical Trials+")

175,404

S28

S11 AND S27

113

S27

S12 OR S13 OR S14 OR S15 OR S16 OR S17 OR S18 OR S19 OR S20 OR S21 OR S22 OR S23 OR S24 OR S25 OR S26

756

S26

TX(mock N3 transfer*)

3

S25

TX(endometri* N5 insult*)

90

S24

TX(endometri* N5 insult*)

0

S23

TX(endometri* N5 lesion*)

110

S22

TX(endometri* N5 wound*)

24

S21

TX(endometri* N5 inflammation)

16

S20

TX(endometri* N5 damag*)

5

S19

TX(endometri* N5 harm*)

1

S18

TX (endometri* N5 trauma*)

2

S17

TX (local N3 injury)

186

S16

TX pipelle

26

S15

TX(endometri* N3 injur*)

17

S14

TX(endometri* N3 scratch*)

4

S13

TX(endometri* N3 biops*)

238

S12

TX(endometri* N3 sampl*)

116

S11

S1 OR S2 OR S3 OR S4 OR S5 OR S6 OR S7 OR S8 OR S9 OR S10

136,488

S10

TX pregnanc*

127,954

S9

TX Infertil*

6,916

S8

TX subfertil*

396

S7

(MM "Infertility")

3,462

S6

TX coitus

1,634

S5

TX intercourse

3,551

S4

TX IUI

71

S3

TX intrauterine insemination

135

S2

TX artificial insemination

436

S1

(MM "Insemination, Artificial")

229

Appendix 7. LILACS search strategy

Web platform

From inception until 29.10.15

(tw:(endometrial injury)) OR (tw:(endometrial sampling)) OR (tw:(endometrial trauma)) OR (tw:(endometrial biopsy)) OR (tw:(pipelle)) AND (tw:(intercourse)) OR (tw:(coitus)) OR (tw:(intrauterine insemination)) OR (tw:(iui)) (0)

Appendix 8. DARE search strategy

From inception until 29.10.15

1 artificial insemination.tw. (2)
2 intrauterine insemination.tw. (26)
3 iui.tw. (5)
4 intercourse.tw. (59)
5 coitus.tw. (9)
6 ovulation induction.tw. (85)
7 subfertil$.tw. (34)
8 infertil$.tw. (191)
9 pregnan$.tw. (1754)
10 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 (1852)
11 (endometri$ adj3 sampl$).tw. (6)
12 (endometri$ adj3 injur$).tw. (2)
13 pipelle.tw. (4)
14 local injury.tw. (1)
15 (endometri$ adj3 trauma$).tw. (0)
16 (endometri$ adj3 harm$).tw. (0)
17 (endometri$ adj3 inflammation).tw. (0)
18 (endometri$ adj3 biops$).tw. (11)
19 (endometri$ adj3 scratch$).tw. (0)
20 (endometri$ adj3 stimul$).tw. (0)
21 (endometri$ adj3 prim$).tw. (9)
22 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 (25)
23 10 and 22 (2)

Appendix 9. ISI Web of Knowledge search strategy

Web Platform

From inception until 29.10.15

Indexes=SCI‐EXPANDED, SSCI, CPCI‐S, CPCI‐SSH Timespan=All years

TOPIC: ("artificial insemination") OR TOPIC: ("intrauterine insemination") OR TOPIC: (iui) OR TOPIC: (intercourse) OR TOPIC: (coitus) OR TOPIC: (infertil&) OR TOPIC: (subfertil$) OR TOPIC: (pregnan$) AND (TOPIC: ((endometri$ and sampl$)) OR TOPIC: ((endometri$ adj3 biops$)) AND TOPIC: ((endometri$ adj3 biops$)) OR TOPIC: ((endometri$ adj3 injur$)) OR TOPIC: (pipelle) OR TOPIC: ((endometri$ adj3 trauma$).) OR TOPIC: ((endometri$ adj3 damag$)) OR TOPIC: ((endometri$ adj3 wound$))) (4)

Appendix 10. 'Risk of bias' assessments

We considered the following methods of random sequence generation adequate.

  • Referring to a random number table.

  • Using a computer random number generator.

  • Coin tossing.

  • Shuffling cards or envelopes.

  • Throwing dice.

  • Drawing of lots.

We considered the following methods of allocation concealment adequate.

  • Central allocation (including telephone, Internet‐based and pharmacy‐controlled randomisation).

  • Sequentially numbered, opaque, sealed envelopes.

Blinding of personnel was not considered important in this review.‐ change back to old text

We considered blinding of personnel important as personnel may treat their patients differently with knowledge of their allocation. We deemed blinding of personnel adequate if the study authors described taking any measures to blind their staff to participant allocation

We considered blinding of participants to be important as knowledge of allocation may lead to changes in behaviour, such as intercourse patterns, and therefore introduce performance bias. We deemed blinding of participants adequate if the study authors described any of the following.

  • Use of a sham procedure.

  • Blinding of women is assessed.

We considered blinding of outcome assessors important only for the subjective outcome of pain. We deemed blinding adequate for this outcome if the study authors described any of the following.

  • Blinding of participants and personnel involved in asking/recording reported pain.

  • Unblinding of participants and personnel involved in asking/recording reported pain (at the end of the study).

Study flow diagram.
Figuras y tablas -
Figure 1

Study flow diagram.

'Risk of bias' summary: review authors' judgements about each 'Risk of bias' category for each included study.
Figuras y tablas -
Figure 2

'Risk of bias' summary: review authors' judgements about each 'Risk of bias' category for each included study.

Forest plot of comparison: 1. Intentional endometrial injury vs. either no intervention or a sham procedure, outcome: 1.1 Live birth or ongoing pregnancy: sensitivity analysis excluding studies at high or unclear risk of allocation concealment.
Figuras y tablas -
Figure 3

Forest plot of comparison: 1. Intentional endometrial injury vs. either no intervention or a sham procedure, outcome: 1.1 Live birth or ongoing pregnancy: sensitivity analysis excluding studies at high or unclear risk of allocation concealment.

Forest plot of comparison: 1. Intentional endometrial injury vs. either no intervention or a sham procedure, outcome: 1.2 Live birth or ongoing pregnancy: sensitivity analysis.
Figuras y tablas -
Figure 4

Forest plot of comparison: 1. Intentional endometrial injury vs. either no intervention or a sham procedure, outcome: 1.2 Live birth or ongoing pregnancy: sensitivity analysis.

Forest plot of comparison: 2 Higher vs. lower degree of intentional endometrial injury, outcome: 2.1 Live birth or ongoing pregnancy.
Figuras y tablas -
Figure 5

Forest plot of comparison: 2 Higher vs. lower degree of intentional endometrial injury, outcome: 2.1 Live birth or ongoing pregnancy.

Forest plot of comparison: 3 Timing of intentional endometrial injury, outcome: 3.1 Live birth or ongoing pregnancy.
Figuras y tablas -
Figure 6

Forest plot of comparison: 3 Timing of intentional endometrial injury, outcome: 3.1 Live birth or ongoing pregnancy.

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 1 Live birth or ongoing pregnancy.
Figuras y tablas -
Analysis 1.1

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 1 Live birth or ongoing pregnancy.

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 2 Live birth or ongoing pregnancy: sensitivity analysis.
Figuras y tablas -
Analysis 1.2

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 2 Live birth or ongoing pregnancy: sensitivity analysis.

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 3 Clinical pregnancy.
Figuras y tablas -
Analysis 1.3

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 3 Clinical pregnancy.

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 4 Miscarriage per clinical pregnancy.
Figuras y tablas -
Analysis 1.4

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 4 Miscarriage per clinical pregnancy.

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 5 Multiple pregnancy per clinical pregnancy.
Figuras y tablas -
Analysis 1.5

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 5 Multiple pregnancy per clinical pregnancy.

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 6 Ectopic pregnancy per clinical pregnancy.
Figuras y tablas -
Analysis 1.6

Comparison 1 Intentional endometrial injury vs. either no intervention or a sham procedure, Outcome 6 Ectopic pregnancy per clinical pregnancy.

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 1 Live birth or ongoing pregnancy.
Figuras y tablas -
Analysis 2.1

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 1 Live birth or ongoing pregnancy.

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 2 Clinical pregnancy.
Figuras y tablas -
Analysis 2.2

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 2 Clinical pregnancy.

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 3 Miscarriage per clinical pregnancy.
Figuras y tablas -
Analysis 2.3

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 3 Miscarriage per clinical pregnancy.

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 4 Multiple pregnancy per clinical pregnancy.
Figuras y tablas -
Analysis 2.4

Comparison 2 Higher vs. lower degree of intentional endometrial injury, Outcome 4 Multiple pregnancy per clinical pregnancy.

Comparison 3 Timing of intentional endometrial injury, Outcome 1 Live birth or ongoing pregnancy.
Figuras y tablas -
Analysis 3.1

Comparison 3 Timing of intentional endometrial injury, Outcome 1 Live birth or ongoing pregnancy.

Comparison 3 Timing of intentional endometrial injury, Outcome 2 Clinical pregnancy.
Figuras y tablas -
Analysis 3.2

Comparison 3 Timing of intentional endometrial injury, Outcome 2 Clinical pregnancy.

Comparison 3 Timing of intentional endometrial injury, Outcome 3 Miscarriage per clinical pregnancy.
Figuras y tablas -
Analysis 3.3

Comparison 3 Timing of intentional endometrial injury, Outcome 3 Miscarriage per clinical pregnancy.

Comparison 3 Timing of intentional endometrial injury, Outcome 4 Multiple pregnancy per clinical pregnancy.
Figuras y tablas -
Analysis 3.4

Comparison 3 Timing of intentional endometrial injury, Outcome 4 Multiple pregnancy per clinical pregnancy.

Summary of findings for the main comparison. Intentional endometrial injury vs. either no intervention or a sham procedure

Patient or population: women trying to get pregnant from intercourse or intrauterine insemination (IUI)
Setting: hospital or clinic
Intervention: intentional endometrial injury
Comparison: no intervention or a sham procedure

Outcomes

Anticipated absolute effects* (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Risk with either: no intervention, or a sham procedure

Risk with Intentional endometrial injury

Live birth or ongoing pregnancy

87 per 1000

194 per 1000
(136 to 275)

RR 2.22
(1.56 to 3.15)

950
(6 RCTs)

⊕⊝⊝⊝
very low1,2

Live birth or ongoing pregnancy ‐ sensitivity

98 per 1000

259 per 1000
(101 to 669)

RR 2.64
(1.03 to 6.82)

105
(1 RCT)

⊕⊝⊝⊝
very low3,4

Pain during the procedure

Pain was not recorded in the control group

Pain was only recorded in the intervention group with an average of 6/10, standard deviation (SD) = 1.5

(1 RCT)

Clinical pregnancy

122 per 1000

241 per 1,000
(184 to 315)

RR 1.98
(1.51 to 2.58)

1180
(8 RCTs)

⊕⊕⊝⊝
low1

*The risk in the intervention group (and its 95% CI) is based on the mean risk in the comparison group and the relative effect of the intervention (and its 95% CI).
Abbreviations: CI: confidence interval; RR: risk ratio; OR: odds ratio; IUI: intrauterine insemination; RCT: randomised controlled trial; SD: standard deviation; GRADE: Grading of Recommendations Assessment, Development and Evaluation.

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect.
Moderate quality: we are moderately confident in the effect estimate: The true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different.
Low quality: our confidence in the effect estimate is limited: The true effect may be substantially different from the estimate of the effect.
Very low quality: we have very little confidence in the effect estimate: The true effect is likely to be substantially different from the estimate of effect.

1Downgraded by 2 levels for risk of bias as many of the included studies are associated with a high risk of bias.
2Downgraded by 1 level for imprecision as the total number of events was relatively low.
3Downgraded by 2 levels for imprecision as the total number of events was relatively low.
4Downgraded by 1 level for indirectness as there was only 1 study available and results not likely generalisable to other populations.

Figuras y tablas -
Summary of findings for the main comparison. Intentional endometrial injury vs. either no intervention or a sham procedure
Summary of findings 2. Higher vs. lower degree of intentional endometrial injury

Patient or population: women trying to get pregnant from intercourse or intrauterine insemination (IUI)
Setting: hospital or clinic
Intervention: higher
Comparison: lower degree of intentional endometrial injury

Outcomes

Anticipated absolute effects* (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Risk with lower degree of intentional endometrial injury

Risk with Higher

Live birth or ongoing pregnancy

102 per 1000

132 per 1000
(73 to 241)

RR 1.29
(0.71 to 2.35)

332
(1 RCT)

⊕⊕⊝⊝
low1,2

Pain during the procedure

(0 study)

Clinical pregnancy

120 per 1000

139 per 1000
(80 to 242)

RR 1.15
(0.66 to 2.01)

332
(1 RCT)

⊕⊕⊝⊝
low1,2

*The risk in the intervention group (and its 95% confidence interval) is based on the mean risk in the comparison group and the relative effect of the intervention (and its 95% CI).
Abbreviations: CI: Confidence interval; RR: Risk ratio; OR: Odds ratio; IUI: intrauterine insemination; RCT: randomised controlled trial; GRADE: Grading of Recommendations Assessment, Development and Evaluation.

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect
Moderate quality: we are moderately confident in the effect estimate: The true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different
Low quality: our confidence in the effect estimate is limited: The true effect may be substantially different from the estimate of the effect
Very low quality: we have very little confidence in the effect estimate: The true effect is likely to be substantially different from the estimate of effect

1Downgraded by 1 level for indirectness as there was only 1 included study. Therefore the result was applicable only to cases of hysteroscopy plus injury vs hysteroscopy alone, and not other cases of higher vs. lower injury.
2Downgraded by 1 level for imprecision as the total number of events was low.

Figuras y tablas -
Summary of findings 2. Higher vs. lower degree of intentional endometrial injury
Summary of findings 3. Different timing of intentional endometrial injury

Patient or population: women trying to get pregnant from intercourse or intrauterine insemination (IUI)
Setting: hospital or clinic
Intervention: IUI cycle
Comparison: preceding cycle

Outcomes

Anticipated absolute effects* (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Risk with injury in preceding cycle

Risk with injury in IUI cycle

Live birth or ongoing pregnancy

267 per 1000

173 per 1000
(99 to 309)

RR 0.65
(0.37 to 1.16)

176
(1 RCT)

⊕⊝⊝⊝
very low1,2,3

Pain during the procedure

(0 RCTs)

Clinical pregnancy

329 per 1000

269 per 1000
(164 to 447)

RR 0.82
(0.50 to 1.36)

276
(2 RCTs)

⊕⊝⊝⊝
very low1,2,3

*The risk in the intervention group (and its 95% CI) is based on the mean risk in the comparison group and the relative effect of the intervention (and its 95% CI).
Abbreviations: CI: confidence interval; RR: risk ratio; OR: odds ratio; IUI: intrauterine insemination; RCT: randomised controlled trial; GRADE: Grading of Recommendations Assessment, Development and Evaluation.

GRADE Working Group grades of evidence
High quality: we are very confident that the true effect lies close to that of the estimate of the effect
Moderate quality: we are moderately confident in the effect estimate: The true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different
Low quality: our confidence in the effect estimate is limited: The true effect may be substantially different from the estimate of the effect
Very low quality: we have very little confidence in the effect estimate: The true effect is likely to be substantially different from the estimate of effect

1Downgraded by 1 level for risk of bias as both studies were at high risk of bias.
2Downgraded by 1 level for imprecision as the total number of events was relatively low.
3Downgraded by 1 level for indirectness as all participants were undergoing stimulation with gonadotrophins.

Figuras y tablas -
Summary of findings 3. Different timing of intentional endometrial injury
Comparison 1. Intentional endometrial injury vs. either no intervention or a sham procedure

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Live birth or ongoing pregnancy Show forest plot

6

950

Risk Ratio (M‐H, Random, 95% CI)

2.22 [1.56, 3.15]

1.1 Live birth

2

320

Risk Ratio (M‐H, Random, 95% CI)

2.48 [1.12, 5.49]

1.2 Ongoing pregnancy

4

630

Risk Ratio (M‐H, Random, 95% CI)

2.16 [1.46, 3.19]

2 Live birth or ongoing pregnancy: sensitivity analysis Show forest plot

1

105

Risk Ratio (M‐H, Random, 95% CI)

2.64 [1.03, 6.82]

2.1 Ongoing pregnancy

1

105

Risk Ratio (M‐H, Random, 95% CI)

2.64 [1.03, 6.82]

3 Clinical pregnancy Show forest plot

8

1180

Risk Ratio (M‐H, Random, 95% CI)

1.98 [1.51, 2.58]

4 Miscarriage per clinical pregnancy Show forest plot

6

174

Risk Ratio (M‐H, Random, 95% CI)

0.73 [0.38, 1.39]

5 Multiple pregnancy per clinical pregnancy Show forest plot

6

261

Risk Ratio (M‐H, Random, 95% CI)

0.93 [0.31, 2.78]

6 Ectopic pregnancy per clinical pregnancy Show forest plot

2

57

Risk Ratio (M‐H, Random, 95% CI)

0.54 [0.09, 3.46]

Figuras y tablas -
Comparison 1. Intentional endometrial injury vs. either no intervention or a sham procedure
Comparison 2. Higher vs. lower degree of intentional endometrial injury

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Live birth or ongoing pregnancy Show forest plot

1

332

Risk Ratio (M‐H, Random, 95% CI)

1.29 [0.71, 2.35]

2 Clinical pregnancy Show forest plot

1

332

Risk Ratio (M‐H, Random, 95% CI)

1.15 [0.66, 2.01]

3 Miscarriage per clinical pregnancy Show forest plot

1

43

Risk Ratio (M‐H, Random, 95% CI)

0.29 [0.03, 2.57]

4 Multiple pregnancy per clinical pregnancy Show forest plot

1

43

Risk Ratio (M‐H, Random, 95% CI)

0.87 [0.20, 3.83]

Figuras y tablas -
Comparison 2. Higher vs. lower degree of intentional endometrial injury
Comparison 3. Timing of intentional endometrial injury

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Live birth or ongoing pregnancy Show forest plot

1

176

Risk Ratio (M‐H, Random, 95% CI)

0.65 [0.37, 1.16]

2 Clinical pregnancy Show forest plot

2

276

Risk Ratio (M‐H, Random, 95% CI)

0.82 [0.50, 1.36]

3 Miscarriage per clinical pregnancy Show forest plot

1

45

Risk Ratio (M‐H, Random, 95% CI)

0.82 [0.17, 4.03]

4 Multiple pregnancy per clinical pregnancy Show forest plot

2

82

Risk Ratio (M‐H, Random, 95% CI)

0.82 [0.17, 4.04]

Figuras y tablas -
Comparison 3. Timing of intentional endometrial injury