The Little Sucker Posted On October 25, 2005 According to the websites, at week 20, the baby is now the size of an average sweet potato. Tell that to Jennifer when it starts squirming around. The latest sonogram shows that the baby is a cutie that sucks it’s thumb. We also saw it waving at us. Add a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Save my name, email, and website in this browser for the next time I comment.