James Van Der Beek had a vasectomy after the birth of his sixth child. The ‘Dawson’s Creek’ actor has Olivia, 14, Joshua, 12, Annabel, ten, Emilia, eight, Gwen, six, and Jeremiah, three, with wife Kimberly but admitted they never planned to have such a large family, so he underwent surgery a few years ago to ensure he didn’t get his spouse pregnant again. Kimberly told People magazine: “Well, we love having kids, but we didn’t really plan it out. It just happened. We had one planned child.” James – who recently revealed he has been diagnosed with colorectal cancer – added: “One! Out of six. On…