Table 2.
Patients' characteristic in FRET cycle categorized according to percentile analysis of E2 levels measured on P initiation day
| Groups of cycles according to E2 level percentile | p | |||
| Group1 (n = 55) | Group 2 (n = 135) | Group 3 (n = 84) | ||
| Duration between freezing and thawing(month) | 8.0 ± 3.8 | 7.2 ± 3.0 | 7.7 ± 3.4 | NS |
| Mean basal serum FSH level(IU/L) | 5.2 ± 2.1 | 6.3 ± 2.4 | 5.8 ± 2.6 | NS |
| Total estradiol doses(mg)a | 44.8 ± 5.5 | 43.9 ± 5.8 | 44.2 ± 5.7 | NS |
| Duration of estradiol supplementation | 18.4 ± 2.3 | 18.8 ± 2.2 | 18.0 ± 2.1 | NS |
| No. of embryos thawed/cycle | 2.9 ± 0.5 | 3.3 ± 0.4 | 3.2 ± 0.5 | NS |
| No. of embryos surviving/thawb | 2.5 ± 0.3 | 2.6 ± 0.2 | 2.4 ± 0.4 | NS |
| Post-thaw embryo survival rate(%) | 86 | 82 | 89 | NS |
| Endometrial thickness(mm)a | 8.6 ± 0.1 | 8.3 ± 0.2 | 8.7 ± 0.3 | NS |
| Embryo score(mean) | 7.1 | 7.3 | 7.2 | NS |
| Pregnancy rate(%) | 44 | 40.8 | 41.9 | NS |
| Implantation rate(%) | 26.2 | 23.1 | 22.5 | NS |
| On going pregnancy rate(%) | 32.2 | 38.4 | 36.3 | NS |
a on the day of progesterone administration
b all the survival embryos were transferred in to uterus