1 In a twin pregnancy. the average is 37 weeks. for triplets 34 and quadruplets 32 weeks. 2  The average birth weight for singletons is 7 lbs 7 oz. 3  Average birth weight of twins is 5 lbs 5 oz. for triplets 4lbs and quads 3lbs. 4  A difference in birth weight between multiples is not unusual.
So, sometime between the 1860s and 1936, the (Democratic) party of small government became the party of big government, and the (Republican) party of big government became rhetorically committed to curbing federal power.
by Natalie Wolchover | September 24, 2012 01:39pm ET. Abraham Lincoln, the 16th U.S. President and a Republican (left), and Franklin Roosevelt, the 32nd U.S. President and a Democrat. The Republican and Democratic parties effectively switched platforms between their presidencies.Credit: Public domain View full size image.y Natalie Wolchover | September 24, 2012 01:39pm ET. Abraham Lincoln, the 16th U.S. President and a Republican (left), and Franklin Roosevelt, the 32nd U.S. President and a Democrat. The Republican and Democratic parties effectively switched platforms between their presidencies.