"A great sign appeared in heaven: a woman clothed with the sun, with the moon under her feet and a crown of twelve stars on her head. 2 She was pregnant and cried out in pain as she was about to give birth."
First off, I want to note that there is some disagreement about the placement of the last verse in the prior chapter, with some of the commentary I read suggesting that Revelation 11:19 seems more fitting as the first sentence in chapter 12. Early manuscripts of the Bible were written in 'scripta continua' or lines of letters unbroken by spaces or punctuation, and the books of the Bible were not separated into chapters and verses until the 13th and 16th century, respectively, so it's easy to see how there might be a conflict between one manuscript or another with regard to where these divisions were placed.