In September 2008, former Republican Vice-Presidential candidate and Alaska governor Sarah Palin announced that her 17-year-old daughter, Bristol Palin, was pregnant and intended to marry the child's father, Levi Johnston. The news came only a few days after John McCain's announcement of Palin as his running mate. The child, Tripp Johnston, was born on December 28, 2008.People: Bristol Palin Welcomes a Son (December 29, 2008)

Rumors had been spreading throughout the Labor Day weekend that Palin's most recent child, Trig Palin, was actually birthed by Bristol, making him the governor's grandchild. New photographic evidence of a visibly-pregnant Sarah Palin seems to have quieted these rumors.Daily Kos: Sarah Palin Story Ender (August 31, 2008)

"We're proud of Bristol's decision to have her baby and even prouder to become grandparents. As Bristol faces the responsibilities of adulthood, she knows she has our unconditional love and support."Los Angeles Times: Sarah Palin announces 17-year-old daughter is pregnant (September 1, 2008)

Sarah Palin released a statement on the governor's Web site a few days after the birth of Tripp. She said the pregnancy had been "shocking news" but that they now feel blessed. Bristol Palin also made a statement, saying her situation was not ideal and that she discourages teens to become pregnant, but that she "can't imagine life without" Tripp.Politico: Bristol: Pregnancy wasn't 'ideal' (January 2, 2009)

• Politico: Bristol: Pregnancy wasn't 'ideal' (January 2, 2009)

• People: Bristol Palin Welcomes a Son (December 29, 2008)

• FoxNews.com: Obama Says Palin Pregnancy "Off Limits" (September 1, 2008)

• Los Angeles Times: Palin announces 17-year-old daughter is pregnant (September 1, 2008)

• AFP: Republicans rocked as Palin says teen daughter pregnant (September 1, 2008)

• Reuters: To rebut rumors, Palin says daughter, 17, pregnant (September 1, 2008)

• WashingtonPost.com: The Political Impact of Bristol Palin's Pregnancy (September 1, 2008)

• International Herald Tribune: Palin says her 17-year-old daughter is pregnant (September 1, 2008)

• Independent.co.uk: Palin confirms daughter's pregnancy (September 1, 2008)

• ABC News: Political Punch: Dobson on Bristol Palin's Pregnancy (September 1, 2008)

• Telegraph.co.uk: Sarah Palin's teenage daughter is pregnant (September 1, 2008)

• Mail Online: Critics claim McCain's running mate is really the grandmother... (September 1, 2008)