The pregnant star says her doctor recommended adding coffee back into her diet.

katherine heigl baby bump
Credit: Katherine Heigl/Instagram

Being pregnant is not always a picnic. Just ask Katherine Heigl who, at 19 weeks along, has been battling indigestion, the occasional stuffy nose, and sinus headaches. And while she may have played both a doctor on TV and a Knocked Up reporter on the big screen, in real life, the former Grey's Anatomy star admits she had no clue how to navigate through life with a bun in the oven.

Luckily, there was no shortage of experienced mamas willing to pass along their helpful tips and tricks. And now that Heigl is finally feeling better, she decided to return the favor in a tell-all post on her blog, Heavenly Days.

Bring 'em on!

While the post discusses everything from her favorite preggo-focused apps and sites to her fave clothing for rocking a baby belly, the biggest surprise is Heigl's take on caffeine.

"Like most ladies, I have heard, read and been told that caffeine is a big no no during pregnancy," she writes. "So when I told my OB/GYN that I was suffering from sinus issues and headaches I was incredibly surprised by her advice. She told me to have a cup or two of coffee a day."

Wait, what?

"My doctor assured me that a cup or two a day was fine but not to over do it," she said. "She told me as long as I wasn't downing a whole pot my baby would be just fine. So I started drinking one or two cups of low acid organic coffee in the mornings and just like she said, my headaches were cured."

As a bonus, Heigl said her ankles were far less swollen, too. Score!

Heigl's doctor's orders are in line with guidelines from the American Congress of Obstetricians and Gynecologists, which hold that moderate caffeine consumption during pregnacy doesn't seem to be a major contributing factor to miscarriage or preterm birth. The key word is moderate, which ACOG defines as less than 200 mg per day. To give some perspective, the average 8 oz. cup of homebrewed black coffee contains about 100 mg of caffeine, but store-bought versions can vary; check out this handy Caffeine Chart from the Center for Science in the Public Interest for a better idea on what your Starbucks and Dunkin cups are packing.

Still, Heigl is well aware that this advice is a little controversial and may not be for everyone.

"I totally get that this remedy may make some expectant mothers too nervous to try," she writes. "I strongly believe that you must use your intuition and instincts when it comes to your and your baby's health; and, though our doctors are offering their best advice and opinions it's still up to us to make the final decisions about our bodies."

Pretty sure Izzy Stevens would agree.

You can check out the rest of Heigl's pregnancy pointers here.

Hollee Actman Becker is a freelance writer, blogger, and a mom. Check out her website for more, and then follow her on Twitter at @holleewoodworld.