The election of Abraham Lincoln in 1860 was the immediate cause of southern resolutions of secession. He was the nominee of the Republican party with an anti-slavery expansion platform, he refused to acknowledge the right to secession, and he would not yield federal property within Southern states.
The gestation period of a human, from time of conception to birth is approximately 9 months (266 days/38 Weeks). 9.5 months is calculated from the first day of the last menstrual period (280 days/40 Weeks).
Only 4 percent are born on the due date. It is an average calculated across large numbers of pregnant women, and finding that the average length of gestation is 280 days after the first day of the last period.There is nothing magical about the date.nly 4 percent are born on the due date. It is an average calculated across large numbers of pregnant women, and finding that the average length of gestation is 280 days after the first day of the last period.