But other research has implicated increasing maternal and paternal age, low birth weight, multiple pregnancies and any medications or infections to which an expectant mom is exposed during pregnancy.
The multiple marker of triple screen is a routine blood test that measures your baby’s risk factor for certain birth defects.
多种标记物的三重检验是常规血液检查项目，用来测量婴儿患特定先天畸形的风险因素。
3
The multiplebirth rate across all age groups has increased steadily over the last ten years but the biggest jump has been among women aged 45 and over, data has showed。