Table 3 Crude prevalence of birth defects and RR with 95 % CI according to plurality and the method of treatment by birth year period (2007–2012, live births)
Fresh embryo transfer | FET | RR (95 % CI) Fresh vs. FET | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
IVF | ICSI | RR (95 % CI) ICSI vs. IVF | Total | |||||||
Live births | Prevalence (%) | Live births | Prevalence (%) | Live births | Prevalence (%) | Live births | Prevalence (%) | |||
Singletons | ||||||||||
2007–2009 | 12,389 | 148 (1.19) | 12,767 | 177 (1.39) | 1.16 (0.93–1.44) | 25,156 | 325 (1.29) | 33,499 | 415 (1.24) | 1.04 (0.90–1.21) |
2010–2012 | 12,739 | 188 (1.48) | 14,745 | 210 (1.42) | 0.97 (0.79–1.17) | 27,484 | 398 (1.45) | 63,209 | 840 (1.33) | 1.09 (0.97–1.23) |
Total | 25,128 | 336 (1.34) | 27,512 | 387 (1.41) | 1.05 (0.91–1.22) | 52,640 | 723 (1.37) | 96,708 | 1255 (1.30) | 1.06 (0.97–1.16) |
Multiple births | ||||||||||
2007–2009 | 2465 | 25 (1.01) | 2222 | 35 (1.58) | 1.55 (0.93–2.59) | 4687 | 60 (1.28) | 4622 | 75 (1.62) | 0.79 (0.56–1.11) |
2010–2012 | 1204 | 14 (1.16) | 1445 | 15 (1.04) | 0.89 (0.43–1.84) | 2649 | 29 (1.09) | 5955 | 108 (1.81) | 0.60 (0.40–0.91) |
Total | 3669 | 39 (1.06) | 3667 | 50 (1.36) | 1.28 (0.85–1.95) | 7336 | 89 (1.21) | 10,577 | 183 (1.73) | 0.70 (0.55–0.90) |