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Table 4 Distribution of pregnancy terminations performed in Brittany according to the context of prenatal diagnosis of cystic fibrosis, and assessment of the impact of each strategy on the incidence rate (period 1986-2009).

From: Evidence for decline in the incidence of cystic fibrosis: a 35-year observational study in Brittany, France

Context of prenatal diagnosis Pregnancy terminations Incidence rate Variation in incidence
  No. Freq. (1/xxxx) (/10,000) (%)
Parents of a CF child 63 60.0% 1/2425 4.1 21.5%
1-in-4 risk couples identified through family testing 17 16.2% 1/2784 3.6 5.8%
1-in-4 risk couples identified following ultrasound examination of pregnancy 25 23.8% 1/2714 3.7 8.5%
Total 105 100.0% 1/2169 4.6 35.8%