Risk factors associated with preterm birth among singletons following assisted reproductive technology in Australia 2007–2009–a population-based retrospective study

Table 3 Perinatal outcomes of singleton births by ART status, Australia, 2007–2009

	Non-ART		ART		P	Total
	(N = 381,345)		(N = 12,105)			(N = 393,450)
	No.	%	No.	%		No.	%
Birth status
Live birth	378,408	99.2	12,009	99.2	0.78	390,417	99.2
Stillbirth	2,937	0.8	96	0.8	0.78	3,033	0.8
Gestational age (weeks)
Mean ± SD	38.9 ± 2.2		38.4 ± 2.5		<0.01	38.9 ± 2.2
<37	25,871	6.8	1,219	10.1	<0.01	27,090	6.9
≥37	355,474	93.2	10,886	89.9	<0.01	366,360	93.1
Gender
Female	184,576	48.4	5,923	48.9	0.26	190,499	48.4
Male	196,675	51.6	6,181	51.1	0.26	202,856	51.6

ISSN: 1471-2393