Katherine Webb shows off her baby bump and her 'outie' in a tight tee during a lazy day at home as she and AJ McCarron count down the final weeks before their due date 

Katherine Webb has shared yet another image of her growing baby bump as she continues to use Instagram to chart the transformation of her body ahead of the arrival of her first child with NFL star AJ McCarron. 

The 26-year-old former Miss Alabama, who married Cincinnati Bengals quarterback AJ in July 2014, took to the photo-sharing app over the weekend, posting an image of herself reclining on the couch at home alongside her beloved pet dog, while showing off her blooming baby bump - and popped 'outie' belly button' - in a form-fitting T-shirt.  

'Saturdayzz... chillen with my outie and my homie [sic],' she captioned the image, which sees her lying back on the couch, with a full face of make-up on, while her dog dozes peacefully on a pillow in the background. 

'Chilling!' Katherine Webb proudly showed off her baby bump - and her 'outie' - in this image, posted to her Instagram account over the weekend

Mom-to-be: On Tuesday evening, the 26-year-old revealed she is 'a week shy of eight months', while posting this picture of her bump

Wearing a skin-tight grey T-shirt, Katherine's swollen belly is clearly visible - as is her belly button, which, like many women during the final stages of their pregnancy, has popped out.

Katherine's latest post comes just a few days after she shared an image of herself showing off her eight-months-along baby bump in a mirror selfie. 

The brunette beauty put her belly on full display on Monday night, lifting up her shirt to show off her growing tum, while snapping a photo of herself.

'A week shy of eight months kiddo. Getting close,' Katherine captioned the image, before adding a smiling emoji.

Clad in a denim jacket, sweatpants, a black sweater and white T-shirt, which she accessorized with a baseball cap and aviator sunglasses, Katherine looked cool and casual, as she snapped the image in her bathroom mirror. 

Updates: The former Miss Alabama has been sharing regular bump updates on social media, posting this similar mirror selfie on February 20, as she and NFL star AJ McCarron near their due date

Katherine and AJ announced that they are expecting their first child together back in December, months after she opened up about the couple's struggle to conceive in a heartfelt Instagram post.

And since sharing their happy news, Katherine has been sure to keep her friends, family and fans updated on her pregnancy progress, sharing images of her baby bump on Instagram at regular intervals; just last month, the brunette beauty showed off her swollen belly with another selfie, taken in the same bathroom mirror, this time wearing a more revealing ensemble of a black bra, paired with some more black sweatpants.   

'Feeling him move is the craziest feeling,' she wrote in the Instagram caption for a picture that shows her proudly checking out her belly in the bathroom mirror. 

'Love watching AJ snuggle with the bump too,' she added. 

But while her baby bump may be occupying most of her attention at the moment, Katherine is still managing to find the time to squeeze in a few other activities; on Tuesday, she posted an image of her newly-coiffed hair on Instagram, explaining that she has been unable to see her usual stylist in LA because she hasn't been able to make the trip there. 

Brunette beauty: Last Tuesday, the former beauty queen also shared this image of herself shortly after a hair appointment, explaining that she has been unable to travel to her usual stylist in LA because of her pregnancy

Supporting act: The mom-to-be joined her friends at a wedding a few weeks ago, dressing her bump in a chic white dress and matching blazer

A-Team: Katherine can be seen supporting her husband before he hit the field with the Cincinnati Bengals. The couple revealed in December that they are expecting their first child together

'I haven't been able to travel to LA to see my love @guy_tang since I've been preggers, but my girl @jessgoldhairmakeup in Atlanta did some work y'all,' she captioned the selfie, which showed her modeling a head of long ombre-d waves. 

And just a few minutes before posting her most recent baby bump pic, Katherine shared a picture of herself at a wedding a few weeks ago in which she can be seen posing alongside the bride, Brittain McCoy Hart, and a few of her friends. 

'Was so happy to be a part of this sweet girls special day a few weeks ago. You looked absolutely beautiful @brittainhart,' she captioned the snap of the group. 

Katherine shared the first picture of her baby bump in December, just two weeks after she and AJ announced that they are expecting a son together. 

Snapping the selfie in the mirror of her doctor's office, Katherine lifted up her long-sleeved top to reveal an almost-completely flat stomach, showing off just the tiniest hint of a baby belly, while the rest of her physique appeared as lean and toned as ever.

'Bubs trying to make an appearance for the Doc,' she captioned the image. 'Some days he pokes out more than others but he's in there lol [sic].' 

Spot the bump! Katherine shared an image of her growing baby belly in December when she was almost five months along in her pregnancy

Big news: Katherine and her husband AJ McCarron announced on Instagram in December that they are having a baby boy in 2016

Pleased as punch: She also shared the news on Twitter, saying that she and AJ felt 'extremely blessed' about their happy news

Katherine jokingly posted a picture of her stomach shortly after eating a McDonald's three months prior to announcing her pregnancy. 

In the funny social media snap, the model shared an image of her bloated post-fast food stomach, before sharing another shot of it looking trimmed, toned and back to normal just a few minutes later.

'Guess what??? I am so excited to announce that I am 20 minutes preggers with an Egg McMuffin,' she wrote, before adding: 'Thank you McDonalds breakfast all-day for this wonderful blessing. I can poke out this food baby so good #reallytho.' 

 While most of her followers assumed it was just a joke at the time, it turns out that the onetime Sports Illustrated model was actually two-months pregnant when posting the snap.

Katherine first revealed the happy news of her pregnancy in December with a sweet and sentimental Instagram post.

Alongside a picture showing her at the doctor's office having an ultrasound, with a beaming AJ posing alongside her, Katherine wrote: 'AJ and I feel beyond blessed and grateful to FINALLY announce after four months we have been keeping a secret! We are having a BOY!'

She added: 'Thank you all so much for your prayers for us as it hasn't been an easy journey. We thank God everyday for this wonderful blessing and can't wait to share this journey with all of you!'   

Sharing the pain: in July, Katherine posted this image of herself and her pet pooch on Instagram, saying that she was turning to the pup for comfort when she was feeling down about not yet being pregnant

Opening up: The former Miss Alabama admitted that the couple had been trying for a baby for some time

Katherine and AJ, the Bengals quarterback, had some difficulty getting pregnant and were thus overjoyed with their baby news, which they also shared with fans on both of their Twitter pages.

The 2012 Miss Alabama winner and her NFL husband got married in July 2014, and had been trying for a baby since last year.

She detailed their struggles on Instagram five months ago, posting a photo of the couple's dog along with the caption: 'We have been trying for the last year to get pregnant with our first, but this little nugget has been my kid either way, and always gives me kisses when I'm down about it.' 

Underneath her original ultrasound photo, which has earned nearly 10,000 likes in one hour, fans wished the pair congratulations on their exciting news.

'Most exciting news ever! Congrats guys!' said one follower, while another shared: 'Congratulations and nothing but happiness and healthy wishes for you and your expanding family!' 

Katherine gained fame during her appearance at the 2013 BCS National Championship Game, when college football announcers began paying more attention to her beauty than what her then-boyfriend AJ was doing on the field.

AJ, meanwhile, was the star quarterback at the University of Alabama, and was a runner-up for the Heisman Trophy in 2013. 

He was drafted by the Bengals in the fifth round of the 2014 NFL draft. A few months later, AJ and Katherine tied the knot in a lavish ceremony by the Gulf shores in Orange Beach, Alabama.