Newspaper editor John O'Sullivan coined the term Manifest Destiny in 1845 to describe the essence of this mindset, which was a rhetorical tone. It was used by Democrats in the 1840s to justify the war with Mexico and it was also used to divide half of Oregon with the United Kingdom.But Manifest Destiny always limped along because of its internal limitations and the issue of slavery, says Merk. It never became a national priority.t was used by Democrats in the 1840s to justify the war with Mexico and it was also used to divide half of Oregon with the United Kingdom. But Manifest Destiny always limped along because of its internal limitations and the issue of slavery, says Merk.
For that reason, experts considered pregnancies to be full term at 37 weeks. Then in 2013 the American College of Obstetricians and Gynecologists (ACOG) and the Society for Maternal-Fetal Medicine (SMFM) reviewed the research and decided to change the definition of full term to 39 weeks.
The only time you might want to be concerned if it is more than a month either way. Full term pregnancy is bettween 37-40 weeks not exactly 40 weeks. If you have a baby at 37 weeks they still consider it full term. You're due date is at 40 weeks and 37 is considered full term. But there is only one month with exactly 4 weeks(most years) so it still is about 9 months.