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).
Gestation Period for Humans. Gestation period for humans is the period from conception to birth and is estimated to be 260 days. But there is lot more to this topic than what appears. Keep reading. The time during which the embryo or fetus gets fully developed in the uterus is called the gestation period or pregnancy.