Skip to main content

Table 1 Baseline characteristics of the study population

From: Follicular phase length has no influence on frozen-thawed embryo transfers in natural cycles

Parameters

Prolonged FPL group (n = 127)

Normal FPL group (n = 737)

p value

Age (years)

32.1 ± 4.22 (22–40)

32.7 ± 4.03 (22–40)

0.087

BMI (kg/m2)

21.8 ± 3.23 (15.3–31.9)

21.7 ± 2.84 (15.5–31.5)

0.774

Infertility type

  

0.659

 Primary

59 (46.5%)

358 (48.6%)

 

 Secondary

68 (53.5%)

379 (51.4%)

 

Infertility duration (years)

4.9 ± 3.1 (1–17)

4.7 ± 3.2 (1–18)

0.445

Infertility factor

  

0.223

 Tubal factor

70 (55.1%)

366 (49.7%)

 

 Male factor

14 (11.0%)

126 (17.1%)

 

 Mixed male and female factor

31 (24.4%)

155 (21.0%)

 

 Unexplained

12 (9.5%)

90 (12.2%)

 

Gravidity

0.98 ± 1.04 (0–4)

0.95 ± 1.09 (0–6)

0.636

Parity

0.34 ± 0.51 (0–2)

0.29 ± 0.49 (0–2)

0.314

No. of previous failed cycles

0.91 ± 0.82 (0–3)

0.97 ± 0.87 (0–3)

0.552

Fertilization method

  

0.696

 IVF

113 (89.0%)

636 (86.3%)

 

 ICSI

12 (9.4%)

84 (11.4%)

 

 IVF + ICSI

2 (1.6%)

17 (2.3%)

 

 Menstrual cycle length

29.0 ± 2.85 (23–38)

28.7 ± 2.71 (21–36)

0.250

  1. FPL follicular phase length