Bristol Palin Posts Sonogram Pic, Says Pregnancy Was 'Planned,' But She 'Made a Mistake'

Bristol Palin is speaking out about her surprise pregnancy.

Read: Despite Abstinence Vow, Bristol Palin is Pregnant Again Out of Wedlock

She just posted her sonogram image on her blog with the title, "My Little Blessing.”

She wrote: “None of us are perfect. I made a mistake... This pregnancy was actually planned. Everyone knows I wanted more kids, to have a bigger family...I got ahead of myself. Things didn't go as planned, but life keeps going. Life moves on.”

Read: Bristol Palin Calls Off Her Memorial Day Wedding

She says her six-year-old son Tripp is ready to be a big brother. She said: “This baby is not a disappointment, and I cannot wait to be a mom times two. Tripp is going to make the best big brother!”

Watch Below: Bristol Palin Breaks Her Silence on Cancelled Wedding