Table 2.

Adjusted odds ratios of male infants by method of fertilization and stage of embryo transfer in ART cycles

	AOR	95% CI	P-value
Spontaneous conception	1.000 (reference)
Non-ART treatment	0.979	(0.915–1.048)	NS
CT	0.914	(0.789–1.058)	NS
BT	1.095	(1.001–1.198)	0.047

Adjusted for the questionnaire results for mother’s age, BMI, metabolic equivalent/min, calorie intake, education, income, smoking status, alcohol intake status, SF-8 physical component summary, SF-8 mental component summary, K6 and history of hyperlipidemia, diabetes, hyperthyroidism, hypothyroidism and the questionnaire results for father’s age, BMI, low education, smoking status, alcohol intake status, SF-8 physical component summary, SF-8 mental component summary, K6

CT (early cleavage-stage embryo transfer), BT (blastocyst transfer), AOR (adjusted odds ratio), CI (confidence interval), NS (not statistically significant)