TABLE 8.
The top 20 keywords in the studies of vitamin D and reproductive health.
| Rank | Keywords | Occurrences | Total link strength | Rank | Keywords | Occurrences | Total link strength |
| 1 | Vitamin D | 912 | 5,584 | 11 | Outcomes | 204 | 1,501 |
| 2 | Vitamin D deficiency | 890 | 5,724 | 12 | Preeclampsia | 196 | 1,369 |
| 3 | Pregnancy | 858 | 5,369 | 13 | Insulin resistance | 172 | 1,122 |
| 4 | Risk | 493 | 3,317 | 14 | Expression | 166 | 881 |
| 5 | Vitamin D supplementation | 396 | 2,805 | 15 | Vitamin D receptor | 162 | 876 |
| 6 | 25-hydroxyvitamin D | 378 | 2,613 | 16 | Children | 161 | 999 |
| 7 | Women | 377 | 2,436 | 17 | Prevalence | 153 | 1,005 |
| 8 | Association | 288 | 1,929 | 18 | Supplementation | 146 | 1,012 |
| 9 | Health | 213 | 1,438 | 19 | Pregnant women | 144 | 986 |
| 10 | Calcium | 205 | 1,261 | 20 | Meta-analysis | 135 | 991 |