Bristol Palin and her son, Tripp, on new docu-series "Bristol Palin: Life's a Tripp" (Richard Knapp/2012 A&E Television Networks)

On the heels of not-so-stellar ratings on the second week of Bristol Palin’s reality show, Lifetime has moved the docu-series out of primetime.

“Bristol Palin: Life’s a Tripp” spent two weeks in the 10 p.m. timeslot. Starting next Tuesday, it will air at 11 p.m., a network rep confirmed, followed by a repeat of “Dance Moms.”

The show’s June 19 debut tanked, drawing only 726,000 viewers, losing more than half of its “Dance Moms” lead-in.

This week, people bailed from two Levi Johnston-centric episodes (Levi — Bristol’s ex/father of her son — has a tell-all book published, Bristol tries to set up a meeting with Levi, etc.). The first episode at 10 p.m. attracted 586,000 people, and then dropped to 426,000 viewers during the second episode at 10:30.

Next week: We’ll see if viewers flock to two very Sarah Palin-themed installments. First, Bristol travels with her to Washington for a CPAC convention, and in the second one, Bristol plans a surprise party for her mom.