Cumulative live birth rates according to the number of oocytes retrieved following the “freeze-all” strategy

Table 4 Patients who discontinued treatment with no live birth but with remaining frozen embryo(s)

Variables	Number of attempt(s)
Variables	1 (N = 117)	2 (N = 151)	3 (N = 77)	4 (N = 26)	5 (N = 9)
Age (years)	28(26–30)	28(26–31)	29(27–31)	29(26–31)	27(24–28)
Body mass index (kg/m²)	22.5(20.0–25.4)	22.3(20.2–25.7)	22.6(20.3–25.4)	24.9(21.3–26.8)	24.0(20.1–26.6)
No. of oocytes yielded (n)	6(5–9) ^ab	8(6–11) ^α	10(8–13)	13(10–18)	15(11.5–16)
No. of embryos used / No. of oocytes yielded (%)	0.33(0.25–0.50) ^ab	0.57(0.40–0.71) ^α	0.73(0.55–0.83)	0.73(0.64–0.88)	0.92(0.80–0.93)
No. of embryos left / No. of oocytes yielded (%)	0.67(0.50–0.75) ^ab	0.43(0.29–0.60) ^α	0.27(0.17–0.45)	0.27(0.13–0.26)	0.08(0.07–0.20)

Note: Data are presented as medians (interquartile ranges, IQRs)
The differences between groups (Bonferroni correction, P < 0.05/10) are indicated by the following superscripts:
^aP, ^bP, ^cP and ^dP indicate group 1 vs. groups 2, 3, 4, and 5, respectively
^αP, ^βP and ^γP indicate group 2 vs. groups 3, 4 and 5, respectively
^†P and ^‡P indicate group 3 vs. groups 4 and 5, respectively
^*P indicates group 4 vs. group 5

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