One child is enough for Bristol Palin.

For now, anyway.

The 21-year-old mother of Tripp, 3, told InTouch magazine she's waiting until marriage to have sex with beau Giacinto “Gino” Paoletti.

Palin, who became a single parent at 18, says being a teen mom is difficult "no matter what your background is."

“My sister Willow is 17, and when I was her age, I was eight months pregnant," Palin said. "I look at her and I think, ‘Holy cow, I was just a baby!’”

After having Tripp, Palin has appeared on "Dancing with the Stars" and is now starring in the new Lifetime reality series, "Life's a Tripp." She has said that she plans to use her fame to encourage other teens to make different choices than she did when it comes to pregnancy and sex.

Palin's celibacy-until-marriage announcement comes just days after "Teen Mom" star Catelynn Lowell announced that she and her fiance, Tyler Baltierra, are waiting to have more children until after they finish their college degrees.

Click through the slideshow below to see photos of Bristol Palin and her sisters, Willow and Piper, over the years.

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  • July 2004 with mom Sarah and sisters Piper & Willow

    (Getty photo)

  • September 2008 in St. Louis, Missouri

    (Getty photo)

  • September 2008 at the Republican National Convention

    (Getty photo)

  • September 2008 with Levi Johnston in Minneapolis

    (Getty photo)

  • August 2008 at an Ohio campaign rally

    (AP photo)

  • May 2009 at a Candie's Foundation event

    (Getty photo)

  • May 2010 with Drew Pinksy at the "Teen Mom Tell All" conference

    (Getty photo)

  • May 2010 at a Candie's Foundation event

    (Getty photo)

  • July 2010 with Levi Johnston and son Tripp

    (Getty photo)

  • September 2010 at the "Dancing With The Stars" premiere

    (Getty photo)

  • September 2010 in workout gear

    (Getty photo)

  • October 2010 with Mario Lopez

    (Getty photo)

  • November 2010 at "Dancing With The Stars"' 200th Episode

    (Getty photo)

  • November 2010 leaving "Good Morning America"

    (Getty photo)

  • December 2010 on ABC's "Dancing With The Stars"

    (AP photo)

  • February 2011 at the Reagan Ranch Center

    (Getty photo)

  • April 2011 with her aunt, Molly McCann

    (Getty photo)

  • April 2011 at an MSNBC after-party

    (Getty photo)

  • May 2011 at a Candie's Foundation event

    (Getty photo)

  • July 2011 with Colbie Caillat

    (Getty photo)