Social-demographic information of participants (n=323)
| Characteristics | N (%) |
| Age (years) | |
| ≤24 | 29（8.98） |
| ≥35 | 57（17.65） |
| 25–29 | 129（39.94） |
| 30–34 | 108（33.44） |
| Highest education | |
| Primary school and below | 4（1.24） |
| Middle school | 61（18.89） |
| High school | 71（21.98） |
| Undergraduate | 180（55.73） |
| Postgraduate and above | 7（2.17） |
| Long-term residence | |
| City | 158（48.92） |
| Urban-rural fringe | 92（28.48） |
| Village | 73（22.60） |
| Religious belief | |
| Buddhism | 34（10.53） |
| Christianity | 5（0.02） |
| Christianity and Buddhism | 1 |
| Other (Chaoshan Grandpa) | 1 |
| None | 282（0.87） |
| Monthly household income (yuan) | |
| 4000–5999 | 56（17.34） |
| 6000–7999 | 59（18.27） |
| 8000–10000 | 112（34.67） |
| >10 000 | 96（29.72） |
| Occupation | |
| Working | 247（76.47） |
| Housewife | 76（23.53） |
| Postpartum care provider | |
| Husband | 72（22.29） |
| Elders | 188（58.20） |
| Maternity matrons | 63（19.50） |
| Place of residence during puerperium | |
| Home | 291（90.09） |
| Maternity hotels | 32（9.91） |
| The main source of dietary contraindications during pregnancy | |
| Suggestion from the elderly | 124（38.39） |
| Religious beliefs | 9（2.79） |
| Local customs | 41（12.69） |
| Personal habits | 149（46.13） |