Comparison of uptake of first and second trimester screening for Down's syndrome during the first year of introduction (October 2008 to September2009)
| Period | Total number. of screening tests | First trimester | Second trimester |
|---|---|---|---|
| October–December 2008 | 721 | 371 (51%) | 350 (49%) |
| January–March 2009 | 594 | 496 (84%) | 98 (16%) |
| April–June2009 | 660 | 530 (80%) | 130 (20%) |
| July–September 2009 | 708 | 537 (76%) | 171 (24%) |
| Total | 2683 | 1934 (72%) | 749 (28%) |