Fig. 1From: The correlation between maternal age and fetal sex chromosome aneuploidies: a 8-year single institution experience in China(a) Change in the relative number of amniocentesis and women with advanced maternal age (≥ 35) undergoing amniocentesis at the Women's Hospital of Zhejiang University, 2011–2018. (b) Trend in the proportion of women with advanced maternal age undergoing amniocentesis at the Women's Hospital of Zhejiang University, and mean age of these women, 2011–2018Back to article page