| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| stem cell research history timeline | 1.24 | 1 | 1162 | 32 |
| stem cell research history | 1.1 | 1 | 9536 | 11 |
| article on stem cell research history | 0.4 | 0.2 | 6335 | 93 |
| stem cell discovery timeline | 0.39 | 0.2 | 4564 | 58 |
| when did stem cell research begin | 1.33 | 0.9 | 7208 | 68 |
| when did stem cell research start | 0.03 | 0.1 | 1956 | 40 |
| history of stem cell | 1.41 | 0.2 | 3110 | 100 |
| when did stem cell research become known | 1.17 | 0.7 | 2806 | 92 |
| stem cell therapy timeline | 1.64 | 0.2 | 2382 | 94 |
| when was stem cell research discovered | 1.28 | 0.4 | 6015 | 74 |
| who started stem cell research | 0.39 | 0.2 | 2740 | 75 |
| stem cell therapy history | 1.95 | 0.2 | 2470 | 35 |
| history of cancer stem cells | 1.79 | 0.4 | 3234 | 8 |
| when were stem cells discovered | 1.88 | 0.5 | 5282 | 33 |
