Willke is a proponent of the concept that rape victims rarely get pregnant, stating in a 1999 article that "There's no greater emotional trauma that can be experienced by a woman than an assault rape. This can radically upset her possibility of ovulation, fertilization, implantation and even nurturing of a pregnancy" and that by his calculations "assault" rape pregnancy is extremely rare and about four cases per state per year. In an interview on August 20, 2012, following the Todd Akin rape and pregnancy controversy, he said: "This is a traumatic thing — she’s, shall we say, she’s uptight. She is frightened, tight, and so on. And sperm, if deposited in her vagina, are less likely to be able to fertilize. The tubes are spastic."