ANCHORAGE, Alaska — Bristol Palin is a mother for the second time.

Palin, who launched an abstinence campaign after giving birth as an unwed teen, posted on Instagram Thursday that she gave birth to a girl, Sailor Grace, on Wednesday.

“Our family couldn’t be more complete,” she wrote beneath a photo of her and her sleeping baby in what appears to be a hospital bed.

It’s the second child for the 25-year-old daughter of 2008 Republican vice presidential nominee Sarah Palin. Family attorney John Tiemessen said he could confirm only that the Instagram account was Bristol Palin’s.

Palin announced her second pregnancy on her blog in June. She has not publicly identified the father of the child, but announced she was pregnant shortly after her engagement to Medal of Honor recipient Dakota Meyer was broken off last spring.

“I know this has been, and will be, a huge disappointment to my family, to my close friends, and to many of you,” she wrote on her blog at the time she announced her second pregnancy. She asked for privacy for her and her son, Tripp.

“I do not want any lectures and I do not want any sympathy,” she wrote.

On Thursday, Meyer tweeted: “Best Christmas present ever!! I couldn’t be more proud of this little blessing.”

Palin was 18 when her mother, then governor of Alaska, was selected by Sen. John McCain to be his running mate. Shortly after the selection, it was announced that the teenager was pregnant with her first child.

At the time, Sarah Palin said her daughter and the baby’s father would marry, but her daughter and the baby’s father ended the relationship.