Method of Primary Embryo Transfer | FET | Fresh |
---|---|---|
Number (Patients) | 62,100 | 166,071 |
Mean age at start (years) | 32.9 ± 4.4 | 34.0 ± 4.5 |
Race/ethnicity (%) | ||
White | 44.6 | 45.9 |
Non-White | 55.4 | 54.1 |
Asian | 9.5 | 8.3 |
Black | 6.9 | 5.8 |
Hispanic | 6.4 | 5.8 |
Other | 7.1 | 7.4 |
Unknown | 25.5 | 26.7 |
Mean D3 FSH (IU/L)b | 7.3 ± 3.2 | 7.8 ± 3.8 |
% Primary Etiology of Infertilityc | ||
DOR | 13.0 | 20.0 |
Tubal | 16.1 | 15.9 |
Uterine | 6.0 | 4.1 |
Ovulatory/PCOS | 38.1 | 30.9 |
Endometriosis | 8.6 | 8.8 |
Unexplained | 14.2 | 17.8 |
Male factor | 38.3 | 36.2 |
Mean number of Embryos Transferred | ||
< 35 | 1.3 ± 0.5 | 1.4 ± 0.5 |
35–37 | 1.4 ± 0.5 | 1.6 ± 0.6 |
38–40 | 1.6 ± 0.6 | 2.0 ± 0.7 |
41–42 | 1.8 ± 0.9 | 2.3 ± 1.0 |
> 42 | 2.0 ± 1.2 | 2.4 ± 1.2 |
% of Day 5 Embryo Transfers | 72.4 | 65.2 |