Table 1. Prevalence of adverse pregnancy outcomes in Pingding and Xiyang Counties from 2007–2012 (1/1,000 births).

Year	Births		Macrosomia			Low birth weight			Preterm births			Stillbirths			Birth defects			Neonatal deaths (≤7 d)
	n		n	Prevalence		n	Prevalence		n	Prevalence		n	Prevalence		n	Prevalence		n	Prevalence
* The 2007 data of Xiyang County were from October to December. † The 2012 data of Xiyang County were from January to September.
2007*	4,497		268	59.6		197	43.8		86	19.1		44	9.8		59	13.1		10	2.2
2008	6,459		410	63.5		317	49.1		158	24.5		88	13.6		66	10.2		24	3.7
2009	5,658		377	66.6		232	41.0		175	30.9		64	11.3		87	15.4		26	4.6
2010	5,371		348	64.8		207	38.5		133	24.8		75	14.0		69	12.8		25	4.7
2011	4,895		286	58.4		183	37.4		83	17.0		56	11.4		59	12.1		18	3.7
2012†	4,490		334	74.4		135	30.1		53	11.8		56	12.5		42	9.4		4	0.9
Total	31,394		2,024	64.5		1,272	40.5		688	21.9		385	12.3		382	12.2		107	3.4