The 37-year-old shared a photo of her pregnant belly on Instagram along with some of her pregnancy favorites.
"As I write this I am 19 weeks pregnant and now believe myself to be an expert on all things pregnancy," the star wrote adding,"Therefore, I thought it only right that I share my hard gained wisdom with all of you presently, and planning to be, gestation ladies out there. I'm joking, I basically know nothing, but there are a few things that I've discovered during the last 19 weeks that have vastly improved my pregnancy experience."
Heigl added, "I thought that even if only a few of my discoveries were helpful to another pregnant gal I should for sure share them. Just like so many wonderful women have shared with me their tips, tricks and advice for getting through this experience with grace and good humor."
From indigestion to caffeine cravings, she's got you covered. Check out her tips on Those Heavenly Days here.