Table 1 Patient characteristics

Age (years) ^a

Body mass index (kg/m ² ) ^a

Primary infertility ^b

Parity ^b

TSH (μU/ml) ^a

TPO-Ab (IU/ml) ^a

TPO-Ab > upper level of normal ^b

TG-Ab (IU/ml) ^a

TG-Ab > upper level of normal ^b

Thyroid medication for overt hypothyroidism ^b

Thyroid medication TSH > 2.5 μIU/ml ^b

Unilateral tubal factor ^b

Presence of PCO-S ^c

Metformin treatment ^b

Clomifen citrate stimulation ^b

Ovulation induction with HCG ^a

Endometrial thickness ^a

Male factor ^b