CNN

Bristol Palin is on the cover of People Magazine.

(CNN) - Bristol Palin's abstinence tour continues this week on the cover of People Magazine.

In an exclusive interview with the magazine, owned by CNN's parent company Time Warner, the 18-year-old Palin says teenagers like her need to think about the consequences before they choose to have sex.

"Girls need to imagine and picture their life with a screaming newborn baby, and then think before they have sex," the daughter of former vice presidential candidate Sarah Palin said.

"If girls realized the consequences of sex, nobody would be having sex," Palin added. "Trust me. Nobody."

The comments come one day after Meghan McCain, the daughter of Arizona Sen. John McCain, criticized Palin's abstinence tour as "not realistic for this generation."

"I think we need to have sex education with condoms, birth control and etc., etc.," McCain said on Comedy Central's The Colbert Report. "I think that if the Republican Party says abstinence only is the only way to be, then we're going to lose a lot of young voters. And I think I wouldn't want to practice anything I didn't preach."

Read full Palin interview on People.com