Female age at oocyte retrieval (y) |
31.19 ± 4.86 |
31.19 ± 4.86 |
30.46
± 4.92 |
<0.001 |
Female age at embryo transfer (y) |
31.66 ± 4.72 |
31.66 ± 4.72 |
30.89
± 4.85 |
<0.001 |
Infertility duration (y) |
3.43 ± 2.97 |
3.43 ± 2.97 |
3.47 ± 2.88 |
0.565 |
BMI (kg/m2) |
21.80 ± 2.88 |
21.80 ± 2.88 |
22.23 ±
3.17 |
<0.001 |
<18.5 (n, %) |
153 (9.93) |
153 (9.93) |
709 (9.30) |
|
18.5-25 (n, %) |
1196 (77.61) |
1196 (77.61) |
5544 (72.70) |
|
>25 (n, %) |
192 (12.46) |
192 (12.46) |
1373 (18.00) |
|
AFC (n) |
10.91 ± 5.15 |
10.91 ± 5.15 |
12.97 ± 6.07 |
<0.001 |
No. of oocyte retrieved (n) |
11.98 ± 6.69 |
11.98 ± 6.69 |
13.78 ± 7.58 |
<0.001 |
Fertilization type (n, %) |
|
|
|
0.948 |
IVF |
1148 (73.45) |
1148 (73.45) |
5681 (73.65) |
|
ICSI |
370 (23.67) |
370 (23.67) |
1821 (23.61) |
|
IVF+ICSI |
45 (2.88) |
45 (2.88) |
211 (2.74) |
|
Infertility type (n, %) |
|
|
|
0.220 |
Primary infertility |
842 (54.50) |
842 (54.50) |
4036 (52.79) |
|
Secondary infertility |
703 (45.50) |
703 (45.50) |
3609 (47.21) |
|
Protocol in the fresh cycle (n, %) |
|
|
|
0.004 |
Agonist |
1127 (72.48) |
1127 (72.48) |
5726 (74.43) |
|
Antagonist |
307 (19.74) |
307 (19.74) |
1537 (19.98) |
|
Other |
121 (7.78) |
121 (7.78) |
430 (5.59) |
|
Previous fresh embryo transfer (n, %) |
741(44.21) |
741(44.21) |
3858(47.88) |
0.006 |
Clinical pregnancy in fresh cycles (n, %) |
427(57.6) |
427(57.6) |
2134(55.3) |
0.246 |
Single blastocyst transfer (n, %) |
|
|
|
0.764 |
No |
1343 (80.13) |
1343 (80.13) |
6482 (80.45) |
|
Yes |
333 (19.87) |
333 (19.87) |
1575 (19.55) |
|
Endometrial thickness on the day of P administration(mm) |
10.94 ± 1.93 |
10.94 ± 1.93 |
9.98 ± 1.55 |
<0.001 |
<7 |
21 (1.25) |
21 (1.25) |
137 (1.70) |
|
≥7 |
1655 (98.75) |
1655 (98.75) |
7909 (98.30) |
|
Triple-line endometrial pattern (n, %) |
|
|
|
0.005 |
A |
284 (16.96) |
284 (16.96) |
1130 (14.05) |
|
B |
1274 (76.06) |
1274 (76.06) |
6388 (79.41) |
|
C |
117 (6.99) |
117 (6.99) |
526 (6.54) |
|
Type of embryo transferred (n, %) |
|
|
|
0.121 |
Cleavage stage |
752 (44.87) |
752 (44.87) |
3449 (42.81) |
|
Blastocyst stage |
924 (55.13) |
924 (55.13) |
4608 (57.19) |
|
No. of transferred embryos (n, %) |
|
|
|
0.219 |
1 |
461 (27.51) |
461 (27.51) |
2126 (26.39) |
|
2 |
1188 (70.88) |
1188 (70.88) |
5835 (72.42) |
|
3 |
27 (1.61) |
27 (1.61) |
96 (1.19) |
|
No. of transferrable embryos (n) |
6.42 ± 4.00 |
6.42 ± 4.00 |
7.26 ±
4.53 |
<0.001 |
No. of good quality embryos transferred (n, %) |
|
|
|
0.001 |
0 |
660 (39.40) |
660 (39.40) |
2770 (34.38) |
|
1 |
592 (35.34) |
592 (35.34) |
3051 (37.87) |
|
2 |
423 (25.25) |
423 (25.25) |
2236 (27.73) |
|