The star and her director partner Paul Thomas Anderson are expecting their third baby, a sibling for Pearl, five, and 18-month-old Lucille.
Rudolph admits Lucille's birth in 2009 was far from smooth, telling People.com, "(A homebirth) was not my plan, but that's what happened... because the baby came out really fast. Luckily, she just kind of glided into her father's arms.
"It was scary, but it was kind of awesome. Hospitals make me nervous because I feel like hospital equals death, like it smells like dead people and weird fluids that pickle people."
And having her baby at home meant a further surprise for Rudolph: "You have to put the placenta somewhere and I didn't know it at the time, but someone put it in my freezer. Then a couple of weeks later I opened the freezer and was like, 'What is that weird meat?' Apparently a lot of cultures eat it. I did not do that, so don't worry, I'm not a weirdo."