Table 1 The characteristics of 1210 patients included the sex ratio among singleton births following the first single blastocyst frozen embryo transfer (FET) cycles performed from January 2015 to February 2019
Characteristic | Description |
|---|---|
Number of cycles | 1210 |
Mean maternal age (years±SD) | 30.5 ± 4.5 |
Mean paternal age (years±SD) | 31.6 ± 5.4 |
Mean maternal BMI (kg/m2) | 23.6 ± 3.2 |
Mean duration of infertility (years±SD) | 3.3 ± 2.6 |
Type of infertility (%) | |
 Primary | 541 (44.7%) |
 Secondary | 669 (55.3%) |
Main infertility cause (%) | |
 Female factor | 661 (54.6%) |
 Male factor | 307 (25.4%) |
 Mixed factor | 193 (16%) |
 Unexplained infertility* | 49 (4%) |
Type of fertilization (%) | |
 IVF | 855 (70.7%) |
 ICSI | 355 (29.3%) |
Day of embryo transfer (%) | |
 D5 | 783 (64.7%) |
 D6 | 427 (35.3%) |
Blastocyst quality of transfer (%) | |
 Good | 638 (52.7%) |
 Poor | 572 (47.3%) |
Singleton livebirths (%) | |
 Male | 667 (55.1%) |
 Female | 543 (44.9%) |