Table I.
Maternal and treatment characteristics in a study of trend in cumulative live birth rate after IVF over time.
| Year of treatment | 2007 | 2011 | 2017 |
|---|---|---|---|
| Oocyte aspirations, n | 9782 | 11 467 | 11 931 |
| Maternal age≥ 35 years, n (%) | 3766 (38.5) | 4965 (43.3) | 4784 (40.1) |
| ICSI, n (%) | 4508/9533 (48) | 5199/10 542 (50) | 5335/10 943 (48) |
| SET, fresh, n (%) | 5973/8536 (70) | 7071/9317 (74) | 7203/8576 (84) |
| SET, FET, n (%) | 3024/3909 (74) | 4508/5085 (89) | 6584/6718 (98) |
| Blastocyst transfer rate, fresh, n (%) | 427/8536 (5) | 1025/9317 (11) | 2659/8576 (31) |
| Blastocyst transfer rate, FET, n (%) | 235/3909 (6) | 1525/5085 (30) | 5912/6718 (88) |
| Number of oocytes retrieved, median (IQR) | 9 (7) | 8 (7) | 9(7) |
Data from www.qivf.se.
SET, single embryo transfer; FET, frozen embryo transfer; IQR, interquartile range.