Obstetric outcomes following ovarian hyperstimulation syndrome in IVF – a comparison with uncomplicated fresh and frozen transfer cycles

Table 1 Demographic characteristics of the OHSS, fresh transfer and frozen transfer groups

	OHSS group n=44	Fresh transfer group n=220	Frozen transfer group n=220	P
Age, years	31.2 ± 5.1	31.2 ± 5.1	31.3 ± 5.1	0.99
BMI, kg/m²	24.2 ± 3.4	24.8 ± 5.9	24.4 ± 5.2	0.78
Nulliparous	26 (59.1%)	130 (59.1%)	130 (59.1%)	>0.99
Smoking	7 (15.9%)	27 (12.2%)	21 (9.5%)	0.40
Chronic hypertension	0	4 (1.8%)	2 (0.9%)	0.50
Pregestational diabetes	0	8 (3.6%)	5 (2.2%)	0.34

Data presented as mean ± SD or n (%) as appropriate
SD standard deviation, n Number, BMI body mass index, pre-gestational, DM diabetes mellitus

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