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Alprazolam
Overall results
Study description
Excluded studies
Table
Graphic
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during pregnancy (anytime or not specified)
1st trimester
2nd trimester
3rd trimester
2nd and/or 3rd trimester
throughout pregnancy
early pregnancy
days before delivery
late pregnancy
preconception-only
periconceptional
preconceptional for kinetic reason
at least 1st trimester
3 months (or more) before pregnancy or during pregnancy
1st and 2nd trimester
3 months or more before pregnancy or1st trimester
Whatever the period exposition
individual studies
Outcome
TE
95% CI
n cases
n exposed
k
Pub. bias
Congenital malformations
All congenital malformations (majors, minors, majors and minors, or unspecified)
Källén, 2013 Noh, 2022 Lee, 2022
3
1.50
[
0.96
; 2.35]
206,551
1,999
not evaluable
Congenital heart defects
Källén, 2013 Tinker, 2019 Noh, 2022
3
1.31
[
0.74
; 2.32]
95,851
1,987
not evaluable
Cleft lip with or without cleft palate
Tinker, 2019
1
1.00
[
0.51
; 1.95]
3,086
49
not evaluable
Cleft palate
Tinker, 2019
1
1.50
[
0.71
; 3.16]
1,578
47
not evaluable
Major congenital malformations
Källén, 2013 Noh, 2022
2
1.53
[
0.93
; 2.51]
206,531
1,917
not evaluable
Ano-rectal atresia and stenosis
Tinker, 2019
1
1.10
[
0.39
; 3.11]
1,066
42
not evaluable
Eye defects
Cifuentes, 2025
1
2.02
[
0.74
; 5.50]
4,185
109
not evaluable
Gastroschisis
Tinker, 2019
1
0.90
[
0.32
; 2.55]
1,400
42
not evaluable
Hydrocephaly
Tinker, 2019
1
1.18
[
0.28
; 4.92]
513
40
not evaluable
Hypospadias
Tinker, 2019
1
0.30
[
0.10
; 0.90]
2,540
-
not evaluable
Neural Tube Defects
Tinker, 2019
1
1.30
[
0.59
; 2.86]
2,105
46
not evaluable
Oesophageal atresia with or without tracheo-oesophageal fistula
Tinker, 2019
1
2.70
[
1.22
; 5.99]
753
46
not evaluable
Anophthalmos/micropthalmos
Tinker, 2019
1
4.00
[
1.21
; 13.22]
230
41
not evaluable
Anotia
Tinker, 2019
1
0.44
[
0.06
; 3.23]
685
39
not evaluable
Aortic valve atresia/stenosis
Tinker, 2019
1
1.19
[
0.29
; 4.95]
510
40
not evaluable
Atresia or stenosis of other parts of small intestine
0
-
-
-
-
-
Atrial septal defect
Tinker, 2019
1
1.10
[
0.59
; 2.06]
3,025
50
not evaluable
Atrioventricular septal defect
Tinker, 2019
1
2.50
[
0.79
; 7.95]
369
41
not evaluable
Bilateral renal agenesis including Potter syndrome
0
-
-
-
-
-
Cardiac septal defects
Tinker, 2019
1
0.80
[
0.41
; 1.55]
4,673
51
not evaluable
Club foot / Talipes equinovarus
0
-
-
-
-
-
Coarctation of aorta
Tinker, 2019
1
0.53
[
0.13
; 2.18]
1,153
40
not evaluable
Congenital cataract
Cifuentes, 2025
1
1.76
[
0.25
; 12.63]
1,361
94
not evaluable
Congenital glaucoma
Cifuentes, 2025
1
3.42
[
0.21
; 55.24]
351
93
not evaluable
Craniosynostosis
Tinker, 2019
1
0.38
[
0.09
; 1.59]
1,579
40
not evaluable
Diaphragmatic hernia
Tinker, 2019
1
0.18
[
0.01
; 2.88]
867
38
not evaluable
Ear malformations
0
-
-
-
-
-
Genital anomalies
0
-
-
-
-
-
Limb reduction defects (LRD)
0
-
-
-
-
-
Microcephaly / Small head circumference for gestational age
Eros, 2002
1
-
-
-
-
-
Omphalocele
Tinker, 2019
1
1.40
[
0.34
; 5.82]
434
40
not evaluable
Oro-facial clefts
0
-
-
-
-
-
Polydactyly
0
-
-
-
-
-
Pulmonary valve stenosis
Tinker, 2019
1
0.80
[
0.30
; 2.12]
1,532
42
not evaluable
Spina bifida
Tinker, 2019
1
1.00
[
0.33
; 3.00]
1,241
42
not evaluable
Tetralogy of Fallot
Tinker, 2019
1
1.20
[
0.44
; 3.29]
1,196
43
not evaluable
Transposition of the great vessels
Tinker, 2019
1
0.20
[
0.01
; 3.26]
765
38
not evaluable
Ventricular septal defect
Tinker, 2019
1
1.00
[
0.40
; 2.50]
1,648
44
not evaluable
Growth parameters and prematurity
Small for gestational age (weight)
Meng a (Controls unexposed, sick), 2023 Kelty (Controls unexposed, sick), 2023
2
2.05
[
0.57
; 7.42]
277,483
14,187
not evaluable
Low birth weight (< 2500g)
Lee, 2022 Kelty (Controls unexposed, sick), 2023
2
2.11
[
0.72
; 6.12]
32
128
not evaluable
Preterm (< 37 weeks)
Lee, 2022 Meng a (Controls unexposed, sick), 2023
2
1.40
[
0.81
; 2.41]
276,199
14,220
not evaluable
Maternal consequences
Caesarean
Kelty (Controls unexposed, sick), 2023
1
1.76
[
0.87
; 3.56]
56
48
not evaluable
Neonatal disorders
Neonatal medical care
Kelty (Controls unexposed, sick), 2023
1
0.94
[
0.39
; 2.26]
28
48
not evaluable
Low Apgar score (< 7) (at 1 min)
0
-
-
-
-
-
Low Apgar score (< 7) (at 5 min)
0
-
-
-
-
-
Intrauterine deaths
Early intrauterine deaths (< 22 weeks) / Spontaneous abortions
Sheehy, 2019 Lee, 2022 Meng b, 2023
3
1.70
[
1.22
; 2.38]
27,201
196
not evaluable
Late intrauterine deaths (> 22 weeks) / Stillbirths
Lee, 2022 Meng a (Controls unexposed, sick), 2023
2
0.99
[
0.84
; 1.16]
32,534
14,395
not evaluable
Perinatal death
Kelty (Controls unexposed, disease free), 2023
1
2.01
[
0.04
; 102.91]
-
48
not evaluable
0.0
100.0
1.0