Bristol Palin Age at Pregnancy: 17 The daughter of would-be Vice President got knocked up during campaigning. Her baby daddy was excluded from the baby's life and so he posed for Playgirl. Jaimie Lynn Spears Age at Pregnancy: 16 The younger sister to Britney Spears and star of Zoe 101 got pregnant and engaged at 16, but broke off her engagement. Jump for more babies with babies! Continue reading HAPPY MILF DAY: Teen Moms →