How often do miscarriages occur?

Miscarriages are common, and often occur before you even realize you are pregnant. Miscarriages occur in 15 to 20 percent of pregnancies, and the likelihood increases with age. 

As pragnancy progresses, the risk of miscarriage decreases, with 80 percent of all miscarriages occuring in the first timester. After the first trimester, the miscarriage risk drops down to 3 percent. After 20 weeks of pregnancy, the miscarriage is classified as either a stillbirth or a neonatal death, wit ha risk of about 0.5 percent.

What factors conrtibute to the risk of a miscarriage

  • Age : 40 year olds are about twice as likely to miscarry as 20 year olds. 
  • A History of miscarriage
  • A history of birth defects of genetic problems
  • A chronic Disease or disorder
  • Uterine or cervical problems
  • Smoking, drinking, and drug use
  • Medications
  • Environmental toxins
  • Obesity
  • Diagnostic Procedures: Chorionic Villus sampling and amniocentesis may increase risk