Findings

What do systematic reviews say?

5 questions · 5 findings · 2 reviews

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No studies found 2 · 40%GRADE not reported 0 · 0%Very low 2 · 40%Low 1 · 20%Moderate 0 · 0%High 0 · 0%

Preconception lifestyle advice on weight vs usual care or attention control

Live birth · women with infertility and obesity

It is very uncertain whether preconception lifestyle advice on weight changes live birth compared with routine care or attention control (very low certainty).

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
RR 0.94 [0.62, 1.43]
2 studies · 707 participants
Very low

Preconception lifestyle advice on alcohol intake vs usual care or attention control

Live birth · women with infertility and at‐risk drinking

It is very uncertain whether preconception lifestyle advice on alcohol intake changes live birth compared with routine care or attention control (very low certainty).

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
RR 1.15 [0.53, 2.5]
1 study · 37 participants
Very low

Lifestyle interventions vs minimal treatment

Fertility: live birth ‐ not reported · women with polycystic ovary syndrome

The review found no eligible studies for this question.

1 finding from 1 review

Lifestyle changes in women with polycystic ovary syndrome 2019 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Preconception lifestyle advice on a combination of topics vs usual care or attention control

Live birth · people with infertility

Preconception lifestyle advice on a combination of topics showed no clear difference in live birth compared with routine care or attention control (low certainty).

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
RR 0.93 [0.79, 1.1]
1 study · 626 participants
Low

Preconception lifestyle advice on smoking vs usual care or attention control

Live birth or ongoing pregnancy · smoking people with infertility

The review found no eligible studies for this question.

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found