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Table 1 All cases: baseline characteristics, ovarian stimulation, and OI outcome

From: Ovulation induction with minimal dose of follitropin alfa: a case series study

Characteristic/variable

All cases (n = 316)

Age, years

31.8 (3.6)

BMI, kg/m2

23.7 (4.2)

Etiology

 

PCOS, n (%)

217 (68.7)

Other/unknown, n (%)

99 (31.3)

Infertility characteristics

 

Duration of infertility, months

27.8 (18.6)

Number of previous OI cycles

1.2 (1.2)

Ovarian stimulation

 

Starting daily dose, IU

37.5 (0.0)

Cycles that completed at 37.5 IU, n (%)

230 (72.8)

Cycles that required a dose increase, n (%)

86 (27.2)

Final daily dose, IU

49.9 (24.1)

Total dose of r-hFSH, IU

517 (410)

Duration of stimulation, days

11.0 (5.1)

Cycles cancelled, n (%)

14 (4.4)

   Poor response, n (%)

10 (3.0)

   Risk of OHSS, n (%)

4 (1.3)

Follicular development

 

Number of follicles ≥16 mm in diameter

1.4 (0.7)

Cycles resulting in 0 follicles, n (%)

9 (2.8)

Cycles resulting in 1 follicle, n (%)

193 (61.1)

Cycles resulting in 2 follicles, n (%)

84 (26.6)

Cycles resulting in ≥3 follicles, n (%)

29 (9.2)

Cycles with no data, n (%)

1 (0.3)

OI outcome

 

Clinical pregnancy, * n (%)

78 (24.7)

   Singleton pregnancy, n (%)

74 (94.9)

   Twin pregnancy, n (%)

4 (5.1)

  1. Values are mean (SD) unless otherwise indicated.
  2. *Defined as gestation ≥7 weeks.
  3. BMI, body mass index; OHSS, ovarian hyperstimulation syndrome; OI, ovulation induction; PCOS, polycystic ovary syndrome; r-hFSH, recombinant human follicle-stimulating hormone; SD, standard deviation.