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. 2023 Jul 31;23:549. doi: 10.1186/s12884-023-05859-0

Table 1.

Baseline characteristics and clinical outcomes of women undergoing fresh or freeze-all strategy in r-ICSI cycles

Group 1 Group 2 P
Fresh embryo transfer (N = 926) Freeze-all-embryos (N = 365)
Maternal age at oocyte retrieval (IQR) — yr 33.00 (30.00–37.00) 31.00 (29.00–35.00) < 0.001
Maternal BMI (IQR) —kg·m 2 22.32 (20.20-24.65) 21.88 (20.20-24.01) 0.260
Infertile years (IQR) — yr 5.00 (3.00–8.00) 3.00 (2.00–6.00) < 0.001
Gravidity—no./total no. (%) < 0.001
0 562/926 (60.69) 260/365 (71.23)
1 192/926 (20.73) 70/365 (19.18)
2 117/926 (12.63) 22/365 (6.03)
≥ 3 90/926 (9.72) 13/365 (3.56)
FSH(IQR) —mIU/mL 7.10 (5.71–8.69) 6.61 (5.25–7.95) < 0.001
E2(IQR) —pg/mL 148.00 (113.50-197.50) 159.00 (121.00-210.00) 0.766
PRL(IQR) —nmol/L 12.40 (8.88–17.60) 12.03 (9.16–16.70) 0.802
LH(IQR) —mIU/mL 3.50 (2.48–5.01) 3.90 (2.65–5.29) 0.733
Gonadotropin dose(IQR)—IU 2850.00 (1950.00-4125.00) 2325.00 (1800.00-3150.00) < 0.001
Lg (Gn) 3.35 (3.21–3.49) 3.45 (3.29–3.60) < 0.001
Number of oocytes retrieval(IQR) 10.00 (6.00–15.00) 13.00 (9.00–19.00) < 0.001
Number of oocytes used for r-ICSI 8.00 (5.00–12.00) 10.00 (7.00–14.00) < 0.001
r-ICSI 2PN fertilization 0.50 (0.25–0.71) 0.54 (0.33–0.72) 0.028
r-ICSI cleavage embryos 6.00 (3.75-9.00) 8.00 (6.00–11.00) < 0.001
positive hCG—no./total no. (%) 101/926 (10.91) 200/365 (54.79) < 0.001
Clinical pregnancy—no./total no. (%) 61/926 (6.59) 173/365 (47.39) < 0.001
IR—no./total no. (%) 76/1971 (3.86) 184/433 (42.49) < 0.001
MR—no./total no. (%) 18/61 (29.51) 36/173 (20.81) 0.166
LBR—no./total no. (%) 43/926(4.64) 137/365 (37.53) < 0.001
Newborns (N) 50 146 -
Cumulative clinical pregnancy—no./total no. (%) 76/926 (8.21) 192/365 (52.60) < 0.001
cLBR—no./total no. (%) 57/926 (6.16) 158/365 (43.29) < 0.001

Note: IR = implantation rate; MR = miscarriage rate; LBR = live birth rate; cLBR = cumulative live birth rate