Table 2 Controlled ovarian stimulation, embryological data and IVF outcome
All | EFD (mm) | p | ||||
|---|---|---|---|---|---|---|
<5 | 5-9.9 | 10-15 | >15 | |||
(n = 1184) | (n = 59) | (n = 548) | (n = 429) | (n = 148) | ||
Gonadotropin total dose (IU) | 2255 ± 1065 | 2178 ± 863 | 2205 ± 1099 | 2283 ± 1070 | 2390 ± 981 | ns |
n. of retrieved oocytes | 8.7 ± 5.2 | 9.7 ± 5.3 | 8.5 ± 5.2 | 8.6 ± 5.1 | 8.9 ± 5.3 | ns |
n. of fertilized oocytes | 5 ± 2.6 | 5.7 ± 2.7 | 5 ± 2.6 | 5 ± 2.6 | 5.1 ± 2.5 | ns |
endometrial thickness (mm) | 10.5 ± 2.6 | 9.7 ± 2.2 | 10.0 ± 2.5 | 11.0 ± 2.5 | 11.7 ± 3.0 | ns |
n. of transferred embryos/ET | 1.9 ± 0.5 | 1.9 ± 0.5 | 1.9 ± 0.5 | 1.9 ± 0.6 | 1.9 ± 0.6 | ns |
Mean embryo score | 8.1 ± 1.8 | 7.9 ± 1.8 | 8.2 ± 0.7 | 8.0 ± 0.8 | 8.1 ± 0.8 | ns |
n. of top scored embryos/ET | 0.5 ± 0.8 | 0.9 ± 1.4 | 0.5 ± 0.8 | 0.5 ± 0.8 | 0.4 ± 0.7 | ns |
n. of pregnancies | 476 | 24 | 227 | 186 | 39 | |
CPR/ET (%) | 40.2 | 40.7 | 41.4 | 43.4 | 26.4* | 0.003 |
Implantation rate (IR) | 19.9 | 19.7 | 20.9 | 20.9 | 12.9* | 0.02 |
Abortion rate (AR) | 21.4 | 42.1 | 17.9 | 22.0 | 26.5 | ns |
Ongoing pregnancies at 10 W | 374 | 14 | 187 | 145 | 29 | |
Ongoing PR/ET | 31.6 | 23.7 | 34.1 | 33.8 | 19.6 | ns |