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Fig. 3 | BMC Pregnancy and Childbirth

Fig. 3

From: Factors affecting low fetal fraction in fetal screening with cell-free DNA in pregnant women: a systematic review and meta-analysis

Fig. 3

Begg’s funnel plot for studies included in the meta-analysis of maternal age (A), gestational age (B), and BMI (C). Each open circle represents one the studies in our meta-analysis. The Standard Error for each study is plotted versus difference in means. The circles are distributed equally around the solid vertical line with a solid diamond at the bottom, representing the overall effect in this study

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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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