Fitness blogger Sarah Stage is eight months pregnant -- but you won't be able to tell by her photos

Fitness blogger Sarah Stage is eight months pregnant -- but you wouldn't believe it if you saw her photos.

The brunette beauty, who got the nickname "six-pack mom" during her first pregnancy, has kept her over 2 million Instagram followers updated during her second pregnancy. On Tuesday, she revealed on the social media app that, eight months into her pregnancy, she has gained around 18 pounds so far.


She also posted a flattering shot of herself in a white bikini, revealing she was 31 weeks pregnant and her baby was "kicking like crazy."

Fitness blogger Sarah Stage
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Fitness blogger Sarah Stage
#31weeks 👶🏻 baby is kicking like crazy !!
We're excited !!! #31weeks 👶🏻 (📸: @von_jackson glam: @makeupbybrittneynicole )
🌊👙☀️ #7monthspregnant & enjoying this sun 🙌🏼Just updated my Diet and Nutrition Guide for you ! It has meal prep🥙, grocery list🛒, recipes🍲 & healthy snack ideas🥑 . Plus protein smoothie recipes too 🍓💪🏼 I also included a special discount for all @proteinworld world products (Lots are safe while Prego but always double check with your dr first)
Hello #thirdtrimester! 👶🏻 These past #7months have flown by 😱Trying to stay in the moment & enjoy every second since we don't plan on having any more babies after this one!! 👨‍👩‍👦‍👦Thanks for all of your support with my fitness ebook & nutrition guide 💪🏼I hope you are loving it 💕 and thank you @hotmiamistyles for this cute orange bikini 👙#7monthspregnant
Hello there baby 👶🏻 Approaching #7months this week and feeling good 🙌🏼! Now off to my glucose test 🤞🏼
Finalizing smoothie recipes 🍌🍓, meal plans🥗, & grocery list 🛒 for you today! Diet and Nutrition Guide Avail now ! You will get all of this plus special discounts on @proteinworld products 🙌🏼LINK IN BIO 😘 #26weekspregnant
Positive vibes only ☺️ #unbothered 💅🏼metallic bikini from @londonbeachswim 👙 #6monthspregnant #26weeks
New jeans since I don't fit into my other jeans at the moment 👶🏻👖pretty sure some of the 13 lbs I've gained has def gone here 🍑🍑 Thanks @freddystoreUSA these they are just what I needed 😽
I'm at a place in my life where happiness, peace and joy are my priority 👶🏻 Especially being #6monthspregnant , there's no room for any negativity so please take it elsewhere ✌🏼Baby #2 is healthy and measuring just fine 🙌🏼 I would think that after having James, who was born almost 9lbs and healthy, people would be more understanding during this pregnancy and keep their ignorant comments to themselves ...🙄 we are all different that's what makes us special and unique! Anyway, thank you to the amazing women who have started my Fitness Ebook and everyone who has supported my journey! 😘Been working hard on updates like meal plans, recipes and grocery list! I'm also including special discounts for @proteinworld they have all kinds of products for women who are expecting too 🤰🏻Love you guys ! 💕
🌊 #6monthspregnant 👶🏻, Meal plan and grocery list are being added to my fitness ebook soon! LINK IN BIO 😘
What are/were some of your food cravings while Prego? 🤰🏻🍉🍔🍩🍓In my fitness ebook I mention meal ideas that can help you stay on track pregnant or not 💁🏻 and @proteinworld has a lot of products that is fine to take while your expecting. Obviously always check with you dr first ! ❤️
Almost #6monthspregnant and just wanted to say Positive Mind 🙂 Positive Vibes ✌🏼 Positive Pregnancy 👶🏻 #23weekspregnant #unbothered 💅🏼 Also, thanks to you ladies who have bought my fitness ebook, please update me with your results !!! Excited for you !!
It feels great to finally share my fitness secrets and workouts with you in my ebook! 👆🏼(LINK IN BIO)I wanted to create something special just for YOU!! 💪🏼You can always leave a comment below if you have any questions or need extra advice/ motivation 😘 Thank you to everyone who has supported me, means so much 😽❤️ PIC: @dreamstatelive TAN: @isabelalysa GLAM: @makeupbybrittneynicole #NoExcuses #PregoLife
TGIF! #6MonthsPregnant next week and feeling grateful for all of the sweet comments! 👶🏻 Also thank you to everyone who got my fitness ebook 🙏🏼 tag me in your progress pics 👀 trying to email each of you individually to check in on you 💕
Feeling baby #2 kicks way more this pregnancy 👶🏻💢 and Yes a lot of Protein World products are safe to use while Prego 🙌🏼 #5monthspregnant @proteinworld
Anyone can be a father , but it takes someone special to be a great dad. #HappyFathersDay 😘 #22weeks
Yesterday he patted my tummy and said "my baby" 👶🏻 Do you think 2 year olds really understand ? 🤔 #5monthspregnant
Pool Days 🍉 Setting some Summer goals with Protein Worlds summer shake down right now! ☀️
Hope you're having a great day! 🦄
It was such a beautified day today in LA! 😻 headed to Stagecoach tomorrow, anyone else going? (workout outfit : @luxefitness )

Stage has garnered criticism for her incredibly fit physique while pregnant. Earlier this month, she posted a video of herself working out and slammed "Instagram medical experts" who had negative things to say about it.

"There are also some people who assume that since I am exercising while pregnant, that I'm obsessed with how I 'look' but in fact I'm obsessed with maintaining a healthy lifestyle that will give my baby and myself the best possible quality of life," she wrote. "Alternatively, I don't judge anyone who chooses to not be active while pregnant etc. as it's their own life ... I'm just sharing my pregnancy journey and appreciate the positive support from most of you."

Stage became an online sensation back in 2015 after photographs of her showing off her washboard abs while nine months pregnant went viral. Despite major backlash on the internet over her fit figure, her son James weighed over eight pounds at the time of his birth.

The negativity clearly hasn't stopped Stage from living her life -- she continues to work out and post fitness photos of herself on Instagram.

Check out the slideshow above for more photos of Stage!

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