TABLE 4.
Treatment outcomes of registered cycles based on patient age in Japan, 2022.
| Age (years) | No. of registered cycles | No. of ET cycles | No. of cycles with pregnancy | Multiple pregnancies | Miscarriage | Cycles with live birth | Pregnancy rate/registered ET (%) | Pregnancy rate/registered cycles (%) | Live birth rate/registered cycles | Miscarriage rate (%) | Multiple pregnancy rate (%) a |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤20 | 80 | 8 | 4 | 0 | 1 | 3 | 50.0 | 5.0 | 3.8 | 25.0 | 0.0 |
| 21 | 73 | 32 | 13 | 2 | 2 | 9 | 40.6 | 17.8 | 12.3 | 15.4 | 8.3 |
| 22 | 106 | 46 | 25 | 1 | 7 | 18 | 54.4 | 23.6 | 17.0 | 28.0 | 4.0 |
| 23 | 321 | 155 | 72 | 3 | 10 | 60 | 46.5 | 22.4 | 18.7 | 13.9 | 4.2 |
| 24 | 704 | 379 | 182 | 6 | 37 | 141 | 48.0 | 25.9 | 20.0 | 20.3 | 1.7 |
| 25 | 1375 | 730 | 386 | 24 | 50 | 317 | 52.9 | 28.1 | 23.1 | 13.0 | 3.5 |
| 26 | 2777 | 1507 | 752 | 20 | 122 | 603 | 49.9 | 27.1 | 21.7 | 16.2 | 2.0 |
| 27 | 5290 | 2961 | 1477 | 72 | 236 | 1193 | 49.9 | 27.9 | 22.6 | 16.0 | 3.4 |
| 28 | 8452 | 4764 | 2306 | 92 | 365 | 1869 | 48.4 | 27.3 | 22.1 | 15.8 | 2.7 |
| 29 | 12 217 | 7054 | 3489 | 148 | 559 | 2831 | 49.5 | 28.6 | 23.2 | 16.0 | 3.1 |
| 30 | 16 342 | 9563 | 4639 | 196 | 830 | 3692 | 48.5 | 28.4 | 22.6 | 17.9 | 3.3 |
| 31 | 19 571 | 11 596 | 5574 | 215 | 1000 | 4415 | 48.1 | 28.5 | 22.6 | 17.9 | 2.7 |
| 32 | 22 481 | 13 366 | 6323 | 236 | 1201 | 4939 | 47.3 | 28.1 | 22.0 | 19.0 | 2.5 |
| 33 | 26 083 | 15 732 | 7312 | 312 | 1391 | 5704 | 46.5 | 28.0 | 21.9 | 19.0 | 3.0 |
| 34 | 30 060 | 18 109 | 8132 | 319 | 1628 | 6268 | 44.9 | 27.1 | 20.9 | 20.0 | 2.9 |
| 35 | 33 153 | 19 818 | 8702 | 394 | 1867 | 6558 | 43.9 | 26.3 | 19.8 | 21.5 | 3.0 |
| 36 | 34 198 | 20 337 | 8486 | 392 | 1940 | 6271 | 41.7 | 24.8 | 18.3 | 22.9 | 3.3 |
| 37 | 36 825 | 21 664 | 8734 | 389 | 2138 | 6335 | 40.3 | 23.7 | 17.2 | 24.5 | 3.2 |
| 38 | 39 450 | 22 535 | 8522 | 416 | 2290 | 5960 | 37.8 | 21.6 | 15.1 | 26.9 | 3.6 |
| 39 | 43 750 | 24 167 | 8320 | 377 | 2517 | 5550 | 34.4 | 19.0 | 12.7 | 30.3 | 3.4 |
| 40 | 42 903 | 22 990 | 7199 | 337 | 2344 | 4616 | 31.3 | 16.8 | 10.8 | 32.6 | 3.3 |
| 41 | 40 639 | 19 954 | 5460 | 231 | 2047 | 3249 | 27.4 | 13.4 | 8.0 | 37.5 | 3.3 |
| 42 | 46 095 | 20 960 | 4651 | 219 | 2007 | 2484 | 22.2 | 10.1 | 5.4 | 43.2 | 3.2 |
| 43 | 29 849 | 13 859 | 2524 | 98 | 1194 | 1246 | 18.2 | 8.5 | 4.2 | 47.3 | 2.6 |
| 44 | 19 824 | 8085 | 1116 | 45 | 577 | 508 | 13.8 | 5.6 | 2.6 | 51.7 | 2.5 |
| 45 | 13 425 | 5131 | 490 | 13 | 280 | 197 | 9.6 | 3.6 | 1.5 | 57.1 | 1.7 |
| 46 | 8019 | 2908 | 190 | 7 | 113 | 77 | 6.5 | 2.4 | 1.0 | 59.5 | 1.6 |
| 47 | 4542 | 1506 | 85 | 3 | 55 | 29 | 5.6 | 1.9 | 0.6 | 64.7 | 0.0 |
| 48 | 2561 | 851 | 39 | 1 | 22 | 16 | 4.6 | 1.5 | 0.6 | 56.4 | 0.0 |
| 49 | 1302 | 432 | 17 | 2 | 8 | 8 | 3.9 | 1.3 | 0.6 | 47.1 | 11.8 |
| ≥50 | 1163 | 412 | 12 | 1 | 6 | 6 | 2.9 | 1.0 | 0.5 | 50.0 | 0.0 |
| Total | 543 630 | 291 611 | 105 233 | 4571 | 26 844 | 75 172 | 36.1 | 19.4 | 13.8 | 25.5 | 3.1 |
Abbreviation: ET, embryo transfer.
a
Multiple pregnancies were defined on the basis of the number of gestational sacs in utero.