Table 1.
PubMed search strategy
| No. | Search | Results |
|---|---|---|
| 1 | Preconception care [MeSH] OR preconceptual OR periconceptual OR “trying to conceive” | 2,659 |
| 2 | Pregnant women [MeSH] OR antenatal OR “prenatal care” OR maternity | 146,042 |
| 3 | Subfertility [MeSH] OR fecunda | 98,227 |
| 4 | Diet habit [MeSH] OR “diet quality” OR “dietary intake” OR “dietary assessment” OR diet records [MeSH] OR “dietary patterns” OR “dietary habits” OR food diaries [MeSH] OR “food habits” OR “food survey” OR “food intake” OR “food frequency” OR “dietary practices” OR nutrition OR “nutritional intake” OR “nutrition survey” | 578,150 |
| 5 | Dietary guidelines [MeSH] OR “food policy” OR “nutrition guidelines” OR “nutrition policy” OR “dietary recommendations” OR “dietary reference intake” OR “eating guidelines” OR “daily recommended allowance” OR “daily recommended intake” OR “reference daily intake.” | 14,015 |
| 6 | 1 OR 2 OR 3 | 243,954 |
| 7 | 4 AND 5 AND 6 | 412 |
a
Denotes that this word was truncated during the search string being entered into the electronic databases.