Answer: 30-40%
Explanation:
The estimated figure is that spontaneous abortion occurs in approximately 1 in 4 recognized pregnancies, with 85% of those occurring in the first trimester (weeks 1 to 12). A 'late' miscarriage, which is much less common, can occur between weeks 13 and 24 of pregnancy.
Where a miscarriage usually occurs in the first 3 months of pregnancy, before 12 weeks of gestation. A small fraction of pregnancy losses, which occurs in less than 1% of pregnancies, are called fetal deaths, since they occur after 20 weeks of gestation.
