1. Delayed childbearing: more women are having their first child later in life;Mathews,2009
2. CDC.gov. Overweight and obesity. 2012. Available at: http://www.cdc.gov/obesity/data/trends.html. Accessed July 24, 2012.
3. Chronic kidney disease in pregnancy;Williams;BMJ,2008
4. K/DOQI clinical practice guidelines for chronic kidney disease: evaluation, classification, and stratification;Am J Kidney Dis,2002
5. Renal function in normal and disordered pregnancy;Hussein;Curr Opin Nephrol Hypertens,2014