TABLE 1.
Recipient and cycle characteristics of frozen donated embryo transfers, 2016–2019
| Donated embryo transfer cycles | |
|---|---|
| N (%) | |
| Total | 8838 |
| Age of oocyte source (y) | |
| <35 | 3746 (42.4) |
| 35–37 | 1325 (15.0) |
| 38–40 | 586 (6.6) |
| 41–42 | 244 (2.8) |
| ≥43 | 479 (5.4) |
| Missinga | 2458 (27.8) |
| Recipient gender | |
| Female | 8718 (98.6) |
| Male | 120 (1.4) |
| Recipient age (y) | |
| <35 | 2152 (24.3) |
| 35–37 | 1282 (14.5) |
| 38–40 | 1494 (16.9) |
| 41–42 | 1191 (13.5) |
| ≥43 | 2719 (30.8) |
| Recipient race/ethnicityb | |
| Non-Hispanic White | 6776 (76.7) |
| Non-Hispanic Asian | 885 (10.0) |
| Hispanic | 556 (6.3) |
| Non-Hispanic Black | 520 (5.9) |
| Two or more races | 54 (0.6) |
| Non-Hispanic Native Hawaiian or Pacific Islander | 24 (0.3) |
| Non-Hispanic American Indian or Alaska Native | 22 (0.2) |
| Recipient infertility diagnosisc,d | |
| Diminished ovarian reserve | 4527 (51.2) |
| Male factor | 2345 (26.5) |
| Ovulatory dysfunction | 1603 (18.1) |
| Unexplained | 708 (8.0) |
| Endometriosis | 560 (6.3) |
| Tubal factor | 538 (6.1) |
| Uterine factor | 419 (4.7) |
| Other | 1896 (21.5) |
| Recipient cycle historyd | |
| First ART, no previous birth | 2380 (27.3) |
| First ART, ≥1 previous births | 659 (7.6) |
| ≥1 previous ART, no previous birth | 3707 (42.5) |
| ≥1 previous ART, ≥1 previous births | 1972 (22.6) |
| Recipient number of previous ART cyclesd,e | |
| 0 | 3039 (34.9) |
| 1 | 1945 (22.3) |
| 2+ | 3734 (42.8) |
| Recipient number of previous pregnanciesd | |
| 0 | 3609 (41.4) |
| 1 | 2210 (25.3) |
| 2+ | 2899 (33.3) |
| Recipient number of previous miscarriagesd | |
| 0 | 5804 (66.6) |
| 1 | 1797 (20.6) |
| 2+ | 1117 (12.8) |
| Recipient number of previous preterm birthsd,f | |
| 0 | 8349 (95.8) |
| 1 | 342 (3.9) |
| 2+ | 27 (0.3) |
| Recipient number of previous term birthsd,g | |
| 0 | 6325 (72.6) |
| 1 | 1683 (19.3) |
| 2+ | 710 (8.1) |
| Number of embryos transferred per cycle | |
| 1 | 4865 (55.0) |
| 2 | 3573 (40.4) |
| 3 | 381 (4.3) |
| >3 | 19 (0.2) |
ART, assisted reproductive technology.
Missing included for all characteristics with >5% missing values; for remainder of characteristics <1% missing;
Recipient race/ethnicity are derived from multiple imputed analyses;
Diagnoses are not mutually exclusive; sum is greater than 100%, as cycle may be associated with more than 1 diagnosis;
Reproductive history variables do not include 120 male patients;
Number of previous ART cycles includes both oocyte retrievals and embryo transfers;
A preterm birth is a birth at ≥20 but <37 completed weeks’ gestation and includes both live births and stillbirths;
A term birth is a birth at ≥37 weeks’ gestation and includes both live birth and stillbirths.