it's not a specific stage--a lot of women have it broken for them. Mine was manually broken about 9 hours before DS was born. It makes contractions hell.
I'll retell what my mom's experiences were with her four labors:
1st: Broken for her during transition.2nd: Broken for her before transition.3rd: Not broken, baby born in caul/membranes. (Claims was her easiest)4rth: Broke on own, labor did not start on own, induced 48+ hours later.
Mine was broken for me, but I resent it being broken because it made my labor speed up needlessly. I'm not planning on having it broken for me this time if it's needed. Would rather have baby born in the caul if anything -- just like every other warm blooded mammal out there.
Trust in the LORD with all your heart, and lean not on your own understanding. In all your ways acknowledge Him,and He shall direct your paths. Proverbs 3:5-6