Pregnancy
Preterm Birth
Preterm Birth is an outcome of pregnancy in which a baby is born earlier than expected. It describes the timing of birth itself, rather than a general pregnancy symptom or a supplement-related effect.
A concise starting point for understanding Preterm Birth during pregnancy.
This list shows research findings, not treatments. Nothing here replaces medical care. If you have this condition, talk to a doctor.
What may help
What studies found for each option, best evidence first.
2 options:1 some evidence1 not enough evidence
YogapracticeSome evidence it helpsSize of effect: Large
Some human studies found a benefit. More research could change this.
All 2 studies with a clear result found a benefit.
A pooled analysis whose study designs were not recorded reported lower preterm-birth risk, but GRADE evidence was rated low. A cohort study of 7,502 people also associated high Yoga participation with lower risk.
Open the Yoga pagePsychotherapypracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
A cohort study found a preterm birth rate of 2.2% in the psychotherapy group, versus 9.4% in Pforzheim and 8.8% with standard care in Baden-Württemberg. The psychotherapy group was, on average, 1.9 years older.
Open the Psychotherapy page
The expert view shows every study, dose protocol and source.
What may help
Interventions recorded as helping with this condition2 listedMost likely to help, from the evidence we have
- →PracticesYogaCertaintyMediumSourceRCTLarge effect
A pooled analysis whose study designs were not recorded reported lower preterm-birth risk (RR=0.29, 95% CI 0.15-0.56, P=0.0002), but GRADE evidence was rated low. A cohort study of 7,502 people also associated high Yoga participation with lower risk (RR=0.42, 95%CI=0.20-0.87).
How big is the effect
Large effectA big difference on average. Check how strong the evidence is.
Who was studied
- People with a condition
- Pregnancy
Open YogaStudy result
Pooled RR=0.29, 95% CI 0.15-0.56, P=0.0002 from 4 RCTs; GRADE evidence rated low.
Low probability(1)
- →PracticesPsychotherapyCertaintyLowSourceClinical
A cohort study found a preterm birth rate of 2.2% in the psychotherapy group, versus 9.4% in Pforzheim and 8.8% with standard care in Baden-Württemberg (p < 0.001). The psychotherapy group was, on average, 1.9 years older.
Who was studied
- People with a condition
Open PsychotherapyStudy result
Psychotherapy group had 2.2% preterm birth rate vs 9.4% in Pforzheim and 8.8% in Baden-Württemberg standard care (p < 0.001), despite psychotherapy mothers being on average 1.9 years older.
What to avoid
Interventions recorded as making it worseNothing in this library is currently recorded as making Preterm Birth worse. Coverage is partial, and absence here is not evidence of safety.
How to read the evidence
Evidence tier — overall strength of the evidence for the whole compound
- StrongWell established — backed by strong, consistent human research.
- ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
- PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
- LimitedVery limited evidence — treat this as a hypothesis, not proof.
- InsufficientNot enough good evidence to draw conclusions yet.
Certainty — how sure we can be that the effect is real
- Very highVery sure — strong, consistent evidence
- HighFairly sure — consistent evidence from good studies
- MediumModerately sure — new studies could change this
- LowNot sure — little or mixed evidence
- Very lowVery unsure — almost no usable evidence
Source — where the data comes from
- Meta-analysisPooled analysis of many trials — the strongest evidence
- RCTRandomized controlled trial — a strong human study design
- ClinicalA human clinical study
- Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
- Animal researchStudied in animals, not humans
- Community reportsAggregated user reports — anecdotal signal, not evidence
- TheoreticalMechanism-based reasoning, not yet tested
Study grade — quality of each underlying study (A best, D weakest)
- AHigh-quality — strong, consistent human trials
- BGood — solid evidence with some limitations
- CModerate — limited, small, or mixed-quality studies
- DWeak — preliminary, indirect, or animal-only
Confidence — how strongly the sources back a finding
A 0–100 score from study quality and agreement
Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.
Full write-up
What is it
Preterm Birth is an outcome of pregnancy in which a baby is born earlier than expected. It describes the timing of birth itself, rather than a general pregnancy symptom or a supplement-related effect. Research in this area includes nutritional and other interventions, but findings about them do not constitute a diagnosis or treatment recommendation.
Evidence-backed options
The options associated with Preterm Birth do not all address the same stage of care. Omega-3 has been studied in mixed health-status groups in relation to the risk of preterm birth, with a small reported effect. Dietary Fiber (Prebiotics) has been evaluated in preterm infants, where findings concern outcomes after birth, including feeding progress, hospital stay, stool frequency, sepsis, and death; this should not be read as evidence that it prevents preterm birth itself.
Vitamin C has been studied alone or with vitamin E, but the findings do not support significant prevention of preterm birth or improvement in related neonatal outcomes. Magnesium requires particular caution in interpretation: the cited evidence is based on case reports describing an association between neonatal bone abnormalities and long-term, high-dose antenatal magnesium sulphate exposure for tocolysis. This finding does not establish magnesium as a preventive option for Preterm Birth.
The evidence therefore spans prevention-related outcomes and care of infants already born preterm, making direct comparisons difficult. These summaries do not specify the doses, treatment durations, or how quickly effects appeared, so they cannot establish an onset timeline or identify the regimen used for each result. Evidence is also limited for some options, and the findings should be interpreted in the context of the studied population and outcome. Anyone considering these options in relation to a medical condition should discuss them with a clinician.
What to avoid
Saccharomyces Boulardii is flagged in the context of preterm birth because it is a live probiotic yeast, and routine administration may be unsuitable for hospitalized preterm or very-low-birth-weight infants. In these infants, intestinal and immune barriers are immature, which can increase the risk that the live yeast causes an invasive infection.
This concern is specific to the vulnerability associated with hospitalization, prematurity, and very low birth weight; it is not a general statement about every person or every use of probiotics. Decisions about Saccharomyces Boulardii in this setting require clinical assessment, with the infant’s condition and level of prematurity taken into account. A clinician can help evaluate whether its use is appropriate.