Table 2.
FET characteristics and outcomes
| Natural cycle | Semi-HRT cycle | HRT cycle | |
|---|---|---|---|
| No. of cycles | 2216 | 1180 | 2018 |
| Delay between cycles (months) | 5.6±2.7 | 5.2±2.0 | 5.3±2.5 |
| Peak endometria thickness (mm) | 10.4±4.2a | 9.0±2.5 | 9.0±2.1 |
| No. of embryo transferred | 2.1±0.5 | 2.0±0.5 | 2.0±0.5 |
| Biochemical pregnancy rate (%) | 3.3 (74/2216) | 3.6 (43/1180) | 3.9 (79/2018) |
| Implantation rate (%) | 21.5 (977/4552) | 25.6 (616/2408) | 29.3 (1197/4080)b |
| Clinical Pregnancy rate (%) | 36.1 (801/2216) | 42.7 (504/1180) | 48.7 (982/2018)b |
| Live birth rate (%) | 85.7 (837/977) | 84.3 (519/616) | 87.0 (1041/1197) |
a
P<0.01;
b
P=0.01.