Main article: Articles of Confederation. The Articles of Confederation and Perpetual Union was the first constitution of the United States. It was drafted by the Second Continental Congress from mid-1776 through late-1777, and ratification by all 13 states was completed by early 1781.
In those under the age of 35 the risk is about 10% while it is about 45% in those over the age of 40. Risk begins to increase around the age of 30. About 80% of miscarriages occur in the first 12 weeks of pregnancy (the first trimester). The underlying cause in about half of cases involves chromosomal abnormalities. Other conditions that can produce similar symptoms include an ectopic pregnancy and implantation bleeding.
There are many reasons why a miscarriage may happen, although the cause is often not identified. If a miscarriage happens during the first trimester of pregnancy (the first three months), it's usually caused by problems with the unborn baby (foetus). About three in every four miscarriages happen during this period. If a miscarriage happens during the second trimester of pregnancy (between weeks 14 and 26), it may be the result of an underlying health condition in the mother. These late miscarriages may be caused by an infection around the baby, which leads to the bag of waters breaking before any pain or bleeding.