It is the spontaneous loss of a pregnancy that occurs during the first 20 weeks of pregnancy, most commonly before 12 weeks. After 20 weeks the loss of the pregnancy is called a stillbirth. About 1 in 7 recognised pregnancies will miscarry and about 1 in 3 women will experience a miscarriage during their reproductive life. A miscarriage may occur so early in a pregnancy that a woman may have been unaware that she was pregnant. These miscarriages are often unreported. Sometimes a doctor or nurse may refer to a miscarriage as a “spontaneous abortion”. “Abortion” is the common medical term given to all pregnancies that end before 20 weeks (both miscarriages and terminations). Miscarriage can be a difficult and traumatic experience for some women. For others, it may happen so early that the pregnancy was undetected.