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.
For the 1927 labor violence, see Columbine Mine massacre. The Columbine High School massacre was a school shooting that occurred on April 20, 1999, at Columbine High School in Columbine, an unincorporated area of Jefferson County in the American state of Colorado.