According to Eric Alterman, Dick Cheney received 4 student draft deferments from 1963-1965 while a student at the University of Minnesota. He married Lynne Cheney in 1964, and became exempt from the draft because he was a married man. But in October 1965, the secret service announced that married men without children could be drafted.
Exactly 9 months and two days later, Dick Cheney's first child was born. Cheney applied for another deferment on that basis when she was only ten weeks pregnant.