Women's International Twenty20 Bowling in Each Season by Morna Nielsen
| Season | | Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ |
| 2011-12 | (New Zealand) | 48 | 1 | 36 | 5 | 4-10 | 7.20 | 1 | 0 | 9.60 | 4.50 |
| 2011-12 | (Australia) | 72 | 0 | 72 | 3 | 2-25 | 24.00 | 0 | 0 | 24.00 | 6.00 |
| 2012-13 | (Sri Lanka) | 72 | 1 | 65 | 3 | 2-10 | 21.66 | 0 | 0 | 24.00 | 5.41 |
| 2012-13 | (Australia) | 48 | 0 | 34 | 3 | 2-25 | 11.33 | 0 | 0 | 16.00 | 4.25 |
| 2013-14 | (New Zealand) | 96 | 1 | 63 | 5 | 2-8 | 12.60 | 0 | 0 | 19.20 | 3.93 |
| 2013-14 | (West Indies) | 90 | 0 | 85 | 2 | 2-24 | 42.50 | 0 | 0 | 45.00 | 5.66 |
| 2013-14 | (Bangladesh) | 114 | 0 | 90 | 5 | 2-23 | 18.00 | 0 | 0 | 22.80 | 4.73 |
| 2014-15 | (West Indies) | 72 | 1 | 49 | 4 | 3-10 | 12.25 | 0 | 0 | 18.00 | 4.08 |
| 2014-15 | (New Zealand) | 66 | 0 | 60 | 2 | 2-25 | 30.00 | 0 | 0 | 33.00 | 5.45 |
| 2015 | (India) | 41 | 0 | 55 | 4 | 3-30 | 13.75 | 0 | 0 | 10.25 | 8.04 |
| 2015-16 | (India) | 120 | 0 | 65 | 3 | 1-13 | 21.66 | 0 | 0 | 40.00 | 3.25 |
| 2015-16 | (New Zealand) | 90 | 0 | 72 | 2 | 2-12 | 36.00 | 0 | 0 | 45.00 | 4.80 |
| 2016-17 | (New Zealand) | 12 | 0 | 7 | 0 | | | | | | 3.50 |