WOMEN - Bleeding during pregnancy

Blood loss through the vagina during pregnancy is 

a common occurrence, especially during early pregnancy.

Blood loss from the vagina during pregnancy is fairly common, affecting about 30 per cent of women. About half of these women will miscarry while the other half will go on to have an otherwise normal pregnancy and a healthy baby.

Most miscarriages occur during the first 12 weeks of pregnancy. Bleeding usually occurs within the first trimester and is known as 'threatened miscarriage', while blood loss after 24 weeks is called 'ante-partum hemorrhage'.

Source: http://www.bodyandsoul.com.au/