Table 3

Birth characteristics by infertility type

	Female		Male		Combined		Unexplained		Total		Female+Combined
	n	Per cent	n	Per cent	n	Per cent	n	Per cent	n	Per cent	n	Per cent
Infertility type	464	38.5	323	26.7	79	6.6	340	28.2	1206	100	543	45.1
Preterm birth (weeks)
Moderate (<37)
Yes	13	3.4	6	2.3	3	4.6	10	3.4	33	3.3	16	3.6
No	368	96.6	256	97.7	62	95.4	283	96.6	980	96.7	430	96.4
Very (<32)
Yes	3	0.8	0	0.0	0	0.0	1	0.3	4	0.4	3	0.7
No	378	99.2	262	100	65	100	292	99.7	1009	99.6	443	99.3
Birth weight
LBW (<2500 g)
Yes	17	4.5	6	2.3	6	9.2	7	2.4	37	3.6	23	5.1
No	365	95.5	256	97.7	59	90.8	286	97.6	978	96.4	424	94.9
VLBW (<1500 g)
Yes	1	0.3	0	0.0	1	1.5	0	0.0	2	0.2	2	0.4
No	381	99.7	262	100	64	98.5	293	100	1013	99.8	445	99.6
Size in relation to mean weight for gestational age
SGA (<−2SD)
Yes	17	3.7	10	3.1	7	8.9	6	1.8	40	3.3	24	4.4
No	447	96.3	312	96.9	72	91.1	334	98.2	1181	96.7	519	95.6
LGA (>2SD)
Yes	12	2.6	9	2.8	0	0.0	9	2.6	30	2.5	12	2.2
No	452	97.4	313	97.2	79	100	331	97.4	1191	97.5	531	97.8

LBW, low birth weight; LGA, large for gestational age; SGA, small for gestational age; VLBW, very low birth weight.