The HCG ratio with a cut-off value of 1.82 can be used to predict pregnancy viability in assisted conception cycles. Also HCG measured 14 and 16days after oocyte retrieval with a cut-off value of 118.56mIU/ml and 258mIU/ml can be used to predict viable multiple pregnancy.
The Articles of Confederation was the first written constitution of the United States. Stemming from wartime urgency, its progress was slowed by fears of central authority and extensive land claims by states before was it was ratified on March 1, 1781.
During the Articles of Confederation period all thirteen states were required to make amendments. The Articles of Confederation was hastily put together in order to provide some sort of government structure in order to fight the British. All states were considered independent and soverign at this time.