Miscarriage rates by week vary from person to person. However, the chance of experiencing a miscarriage, or a pregnancy loss, starts to drop as the pregnancy progresses. The risk figures for pregnancy loss are just averages, so each person's chance may be higher or lower depending on a range of factors.

What week is the highest risk of miscarriage?

The first trimester is associated with the highest risk for miscarriage. Most miscarriages occur in the first trimester before the 12th week of pregnancy. A miscarriage in the second trimester (between 13 and 19 weeks) happens in 1% to 5% of pregnancies.

Is miscarriage less likely after 8 weeks?

Conclusion: For women without symptoms, the risk of miscarriage after attending a first antenatal visit between 6 and 11 weeks is low (1.6% or less), especially if they present at 8 weeks of gestation and beyond.