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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.
3,601 questions in 252 reviews · Pregnancy and Childbirth
current versionsNo studies 726 · 20.2%Ungraded 421 · 11.7%Very low 828 · 23%Low 993 · 27.6%Moderate 486 · 13.5%High 147 · 4.1%
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.
| Question | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Pneumococcal vaccine vs control vaccine Pneumococcal colonization ‐ By 6‐7 months of age · Pregnant women undergoing vaccination to prevent infant infection Pneumococcal vaccination during pregnancy for preventing infant infection (2015) · Cochrane | RR 0.67 [0.22, 2.08] | 2 studies · 148 participants | Low |
Routine fetal movement counting vs mixed or undefined fetal movement counting Perinatal death and or severe morbidity (neonatal intensive care unit admission, neonatal encephalopathy) · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | no estimate extracted | NR | No studies |
Routine fetal movement counting vs mixed or undefined fetal movement counting Caesarean section · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | RR 0.93 [0.6, 1.44] | 1 study · 1076 participants | Low |
Routine fetal movement counting vs mixed or undefined fetal movement counting Perinatal death · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | no estimate extracted | 1 study · 1076 participants | Low |
Routine fetal movement counting vs mixed or undefined fetal movement counting Maternal anxiety · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | no estimate extracted | 1 study · 1013 participants | Moderate |
Routine fetal movement counting vs mixed or undefined fetal movement counting Maternal‐fetal attachment · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | no estimate extracted | 1 study · 951 participants | Low |
Routine fetal movement counting vs mixed or undefined fetal movement counting Antenatal hospital admission rate per cluster (mean) · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | SMD 0.38 | 1 study · 52 participants | Low |
Routine fetal movement counting vs mixed or undefined fetal movement counting Low birthweight (< 2500 g or < 10th centile) · Pregnant women who had reached the gestational age of fetal viability Fetal movement counting for assessment of fetal wellbeing (2015) · Cochrane | RR 0.98 [0.66, 1.44] | 1 study · 1073 participants | Low |
Specialised antenatal clinics vs standard care Perinatal death · Women with a multiple pregnancy for improving maternal and infant outcomes Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes (2015) · Cochrane | RR 1.02 [0.26, 4.03] | 1 study · 324 participants | Very low |
Specialised antenatal clinics vs standard care Caesarean birth · Women with a multiple pregnancy for improving maternal and infant outcomes Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes (2015) · Cochrane | RR 1.38 [1.06, 1.81] | 1 study · 162 participants | Moderate |
Specialised antenatal clinics vs standard care Postnatal depression (6 months' postpartum). EPDS score 13 or more. · Women with a multiple pregnancy for improving maternal and infant outcomes Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes (2015) · Cochrane | RR 0.48 [0.19, 1.2] | 1 study · 133 participants | Very low |
Specialised antenatal clinics vs standard care Breastfeeding 6 months' postpartum · Women with a multiple pregnancy for improving maternal and infant outcomes Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes (2015) · Cochrane | RR 0.63 [0.24, 1.68] | 1 study · 123 participants | Very low |
Specialised antenatal clinics vs standard care Small‐for‐gestational age · Women with a multiple pregnancy for improving maternal and infant outcomes Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes (2015) · Cochrane | no estimate extracted | NR | No studies |
Specialised antenatal clinics vs standard care Very preterm birth (defined as birth less than 34 weeks' gestation) · Women with a multiple pregnancy for improving maternal and infant outcomes Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes (2015) · Cochrane | no estimate extracted | NR | No studies |
Brochure and an audiotape vs standard care Rate of toxoplasmosis seroconversion in pregnant women · women of reproductive age, irrespective of their pregnant status Prenatal education for congenital toxoplasmosis (2015) · Cochrane | RR 1.7 [0.56, 5.21] | 1 study · 3949 participants | Low |
Brochure and an audiotape vs standard care Pregnant women behavior with respect to the avoidance of risk factors for toxoplasmosis infection during pregnancy (no consumption of uncooked meat of any type) · women of reproductive age, irrespective of their pregnant status Prenatal education for congenital toxoplasmosis (2015) · Cochrane | OR 1.21 [0.98, 1.5] | 1 study · 1 participants | Moderate |
Brochure and an audiotape vs standard care Pregnant women behavior with respect to the avoidance of risk factors for toxoplasmosis during pregnancy (hand washing after contact with transmission factor and before meals) · women of reproductive age, irrespective of their pregnant status Prenatal education for congenital toxoplasmosis (2015) · Cochrane | OR 1.01 [0.38, 1.22] | 1 study · 1 participants | Low |
Brochure and an audiotape vs standard care Rate of congenital toxoplasmosis defined by persistence of IgG antibodies beyond 11 months · women of reproductive age, irrespective of their pregnant status Prenatal education for congenital toxoplasmosis (2015) · Cochrane | no estimate extracted | NR | No studies |
Brochure and an audiotape vs standard care Pregnant women knowledge of risk factors for acquiring toxoplasmosis infection as objectively measured through specific questionnaire · women of reproductive age, irrespective of their pregnant status Prenatal education for congenital toxoplasmosis (2015) · Cochrane | no estimate extracted | NR | No studies |
Brochure and an audiotape vs standard care Pregnant women awareness of the importance of avoiding toxoplasmosis infection during pregnancy as objectively measured through specific questionnaire · women of reproductive age, irrespective of their pregnant status Prenatal education for congenital toxoplasmosis (2015) · Cochrane | no estimate extracted | NR | No studies |
Lower genital tract infection screening vs no screening Preterm birth less than 37 weeks · pregnant women presenting for routine prenatal care Antenatal lower genital tract infection screening and treatment programs for preventing preterm delivery (2015) · Cochrane | RR 0.55 [0.41, 0.75] | 1 study · 4155 participants | Moderate |
Lower genital tract infection screening vs no screening Preterm low birthweight (below or equal 2500 g) · pregnant women presenting for routine prenatal care Antenatal lower genital tract infection screening and treatment programs for preventing preterm delivery (2015) · Cochrane | RR 0.48 [0.34, 0.66] | 1 study · 4155 participants | Moderate |
Lower genital tract infection screening vs no screening Preterm very low birthweight (below or equal 1500 g) · pregnant women presenting for routine prenatal care Antenatal lower genital tract infection screening and treatment programs for preventing preterm delivery (2015) · Cochrane | RR 0.34 [0.15, 0.75] | 1 study · 4155 participants | Moderate |
Planned caesarean section vs planned vaginal birth Maternal death or serious maternal morbidity · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | RR 0.86 [0.67, 1.11] | 2 studies · 2844 participants | Moderate |
Planned caesarean section vs planned vaginal birth Perinatal or neonatal death or serious neonatal morbidity · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | RR 1.15 [0.8, 1.67] | 1 study · 5565 participants | Moderate |
Planned caesarean section vs planned vaginal birth Disability in childhood · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | no estimate extracted | 0 studies · 0 participants | Ungraded |
Planned caesarean section vs planned vaginal birth Perinatal or neonatal death · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | RR 1.41 [0.76, 2.62] | 2 studies · 5685 participants | Moderate |
Planned caesarean section vs planned vaginal birth Serious neonatal morbidity · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | RR 1.03 [0.65, 1.64] | 2 studies · 5644 participants | Moderate |
Planned caesarean section vs planned vaginal birth Longer‐term maternal outcomes: failure to breastfeed · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | RR 1.14 [0.95, 1.38] | 1 study · 2570 participants | Moderate |
Planned caesarean section vs planned vaginal birth Longer‐term maternal outcomes: postnatal depression, as defined by trial authors (EPDS > 12) · women with a twin pregnancy Planned caesarean section for women with a twin pregnancy (2015) · Cochrane | RR 0.95 [0.78, 1.14] | 1 study · 2570 participants | Moderate |
Caffeinated (experimental group) vs decaffeinated group (control group) Birthweight (g) · Pregnant women recruited before 20 weeks' gestation Effects of restricted caffeine intake by mother on fetal, neonatal and pregnancy outcomes (2015) · Cochrane | MD 20 | 1 study · 1197 participants | Low |
Caffeinated (experimental group) vs decaffeinated group (control group) Preterm birth · Pregnant women recruited before 20 weeks' gestation Effects of restricted caffeine intake by mother on fetal, neonatal and pregnancy outcomes (2015) · Cochrane | RR 0.81 [0.48, 1.37] | 1 study · 1153 participants | Low |
Caffeinated (experimental group) vs decaffeinated group (control group) Low birthweight · Pregnant women recruited before 20 weeks' gestation Effects of restricted caffeine intake by mother on fetal, neonatal and pregnancy outcomes (2015) · Cochrane | no estimate extracted | NR | No studies |
Caffeinated (experimental group) vs decaffeinated group (control group) Perinatal mortality rate · Pregnant women recruited before 20 weeks' gestation Effects of restricted caffeine intake by mother on fetal, neonatal and pregnancy outcomes (2015) · Cochrane | no estimate extracted | NR | No studies |
Caffeinated (experimental group) vs decaffeinated group (control group) Sudden infant death syndrome · Pregnant women recruited before 20 weeks' gestation Effects of restricted caffeine intake by mother on fetal, neonatal and pregnancy outcomes (2015) · Cochrane | no estimate extracted | NR | No studies |
Caffeinated (experimental group) vs decaffeinated group (control group) Gestational diabetes · Pregnant women recruited before 20 weeks' gestation Effects of restricted caffeine intake by mother on fetal, neonatal and pregnancy outcomes (2015) · Cochrane | no estimate extracted | NR | No studies |
Routine/revealed vs selective/concealed ultrasound Detection of fetal abnormality before 24 weeks' gestation · Pregnant women at less than 24 weeks' gestation undergoing fetal assessment by ultrasound Ultrasound for fetal assessment in early pregnancy (2015) · Cochrane | RR 3.46 [1.67, 7.14] | 2 studies · 387 participants | Moderate |
Routine/revealed vs selective/concealed ultrasound Detection of multiple pregnancy by 24 to 26 weeks' gestation (number NOT detected) · Pregnant women at less than 24 weeks' gestation undergoing fetal assessment by ultrasound Ultrasound for fetal assessment in early pregnancy (2015) · Cochrane | RR 0.07 [0.03, 0.17] | 7 studies · 295 participants | Moderate |
Routine/revealed vs selective/concealed ultrasound Induction of labour for 'post‐term' pregnancy · Pregnant women at less than 24 weeks' gestation undergoing fetal assessment by ultrasound Ultrasound for fetal assessment in early pregnancy (2015) · Cochrane | RR 0.59 [0.42, 0.83] | 8 studies · 25516 participants | Low |
Routine/revealed vs selective/concealed ultrasound Perinatal death (all babies) · Pregnant women at less than 24 weeks' gestation undergoing fetal assessment by ultrasound Ultrasound for fetal assessment in early pregnancy (2015) · Cochrane | RR 0.89 [0.7, 1.12] | 10 studies · 35735 participants | Low |
Calcium supplementation vs placebo or no treatment (maternal outcomes) Preterm birth (a) Birth prior to 37 weeks · healthy pregnant women receiving calcium supplementation vs placebo or no treatment Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and… (2015) · Cochrane | RR 0.86 [0.7, 1.05] | 13 studies · 16139 participants | Moderate |
Calcium supplementation vs placebo or no treatment (maternal outcomes) Preterm birth (b) Birth prior to 34 weeks · healthy pregnant women receiving calcium supplementation vs placebo or no treatment Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and… (2015) · Cochrane | RR 1.04 [0.8, 1.36] | 4 studies · 5669 participants | Moderate |
Calcium supplementation vs placebo or no treatment (maternal outcomes) Low birthweight (< 2500 g) · healthy pregnant women receiving calcium supplementation vs placebo or no treatment Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and… (2015) · Cochrane | RR 0.93 [0.81, 1.07] | 6 studies · 14162 participants | Moderate |
All diet and/or exercise interventions vs standard/other care Excessive weight gain · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | RR 0.8 [0.73, 0.87] | 24 studies · 7096 participants | High |
All diet and/or exercise interventions vs standard/other care Mean GWG (kg) · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | no estimate extracted | NR | No studies |
All diet and/or exercise interventions vs standard/other care Low weight gain · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | RR 1.14 [1.02, 1.27] | 11 studies · 4422 participants | Moderate |
All diet and/or exercise interventions vs standard/other care Preterm birth · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | RR 0.91 [0.68, 1.22] | 16 studies · 5923 participants | Moderate |
All diet and/or exercise interventions vs standard/other care Pre‐eclampsia · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | RR 0.95 [0.77, 1.16] | 15 studies · 5330 participants | High |
All diet and/or exercise interventions vs standard/other care Caesarean delivery · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | RR 0.95 [0.88, 1.03] | 28 studies · 7534 participants | High |
All diet and/or exercise interventions vs standard/other care Macrosomia Infant birthweight > 4000 g · pregnant women Diet or exercise, or both, for preventing excessive weight gain in pregnancy (2015) · Cochrane | RR 0.93 [0.86, 1.02] | 27 studies · 8598 participants | High |