An ectopic pregnancy can be life threatening to a woman when the embryo implants onto locations outside the uterine cavity. That's because the tissue in these areas can't stretch like the uterus and if the embryo implants into the vascular supply, blood vessels can start bleeding, Kickham said.
Publication was timed to coincide with the tenth anniversary of the Columbine High School massacre, which occurred on April 20. The book spent eight weeks on The New York Times bestseller list in the spring of 2009, peaking at #3.
Since then, the Columbine High School massacre has been remembered as one of the most infamous school shootings in U.S. history, and it has even been blamed for inspiring more recent shootings at other schools. Still, as infamous as it was, Columbine wasn't the first, or the deadliest, school shooting in America. On April 20, 1999, Harris and Klebold opened fire inside their high school near Denver. They also planted bombs, although the explosives never detonated. All in all, they killed 12 students, one teacher, and themselves, and they wounded 21 others.