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Table 2 Baseline characteristics and IVF outcomes in the POA and control groups in women aged <33 years

From: Predictive value of age-specific FSH levels for IVF-ET outcome in women with normal ovarian function

Characteristics <33 years old t/z(χ 2 ) P
  Control POA   
n 356 294   
Age(y)a 28.64 ± 2.49 28.92 ± 2.37 1.462 0.144
Infertility years(y)a 3.84 ± 2.48 3.81 ± 2.34 −0.140 0.889
BMI(kg/m2)a 21.30 ± 3.06 20.35 ± 2.27 −4.528 <0.001
FSH(IU/L)a 6.46 ± 1.03 9.21 ± 1.00 34.362 <0.001
LH(IU/L)b 3.81(2.94–4.89) 4. 78(3.62–5.82) 44.850 <0.001
E2(ng/L)b 38.00(25.90–51.00) 37.77(26.00–50.58) 0.039 0.844
FSH/LHb 1.76(1.32–2.18) 1.95(1.57–2.50) 20.869 <0.001
AFC(n)a 16.14 ± 5.82 14.58 ± 5.25 −3.554 <0.001
Total dose of Gn (IU)a 1,874.20 ± 609.07 2,051.08 ± 612.17 3.639 <0.001
E2 level on DHCG (ng/L)b 3,818.70 (2,413.24–4,800.00) 3,563.50 (2,222.75–4,800.00) 3.107 0.078
Number of retrieved oocytes(n)a 14.86 ± 7.35 12.55 ± 6.22 −4.234 <0.001
Rate of POR(%)c 1.42(5/353) 6.46(19/294) 11.585 0.001d
Number of frozen embryos (n)b 5.00(3.00–8.00) 5.00(3.00–8.00) 3.895 0.048
Number of available embryos (n)b 7.00(5.00–10.00) 7.00(4.00–9.00) 3.761 0.052
Fertilization rate(%)c 84.62(66.67–94.44) 85.71(71.43–100.00) 1.858 0.173
Cleavage rate(%)c 100.00 (100.00–100.00) 100.00 (100.00–100.00) 0.221 0.638
Cancellation rate(%)c 0.84(3/356) 2.72(8/294) 3.415 0.065e
Pregnancy rate (%)c 55.52(196/353) 54.55(156/286) 0.061 0.805
  1. aThe normally distributed data are presented as the mean ± SD, including age, infertility years, BMI, FSH, AFC, total dose of Gn, and number of retrieved oocytes. The t-test was performed to analyze statistical significance
  2. bThe non-normally distributed data are presented as the median (25–75th percentile). The non-parametric Mann–Whitney test was performed to calculate the Z-score
  3. cThe chi-square (χ 2) test was performed to analyze statistical significance
  4. dThe rate of POR = (the cycles of oocyte yields ≤ 3 + the cycles cancelled egg retrieval)/the total cycles
  5. eThe cancellation rate only included the cycles of cancelled egg retrieval