Bristol Palin announces birth of second child
Bristol Palin is a mother for the second time.
Ms Palin, who launched an abstinence campaign after giving birth as an unwed teenage mother, posted on Instagram that she gave birth to a girl, Sailor Grace, on Wednesday.
It is the second child out of wedlock for the daughter of 2008 Republican US vice presidential nominee Sarah Palin.
Family lawyer John Tiemessen said he could confirm only that the Instagram account was Bristol Palin's.
Ms Palin was an 18-year-old unwed mother when she launched the abstinence campaign soon after giving birth to son Tripp in December 2008.
She was engaged to Medal of Honor recipient Dakota Meyer, but the wedding was called off days before the ceremony earlier this year.
Ms Palin has not publicly disclosed the father of her newborn daughter.
"Our family couldn't be more complete," Ms Palin wrote on Instagram beneath a photo of her and her sleeping baby in what appears to be a hospital bed.
She announced her second pregnancy on her blog in June.
"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 at the time.
She asked for privacy for her and Tripp, adding: " I do not want any lectures and I do not want any sympathy."
Mr Meyer tweeted: "Best Christmas present ever!! I couldn't be more proud of this little blessing."
He also posted a photo of a sleeping infant held by someone wearing a hospital gown with the same pattern as the one shown on Bristol Palin's Instagram post.
Shortly after Sarah Palin, then governor of Alaska, was selected by Senator John McCain to be his running mate, it was announced that her teenage daughter was pregnant with her first child.
At the time, Sarah Palin said that Bristol and the baby's father would marry. Bristol Palin and the baby's father, Levi Johnston, eventually ended the relationship.
Bristol Palin later became a paid spokeswoman advocating abstinence and warning against teenage pregnancies.
She also performed on Dancing With The Stars and had a short-lived cable TV show called Life's A Tripp.