Chrissy Teigen has revealed she is feeling her belly kick in the same week her baby Jack was meant to be born (Image: Getty Images)

Chrissy Teigen has revealed she is feeling her belly kick in the same week her baby Jack was meant to be born.

The model, 35, tragically lost her baby son back in September and documented the agonising experience in a set of devastating pictures on social media.

Taking to Twitter on Wednesday evening, Chrissy shared that she was feeling a "bit off" and was shocked to feel kicks in her belly, which she shared a video of.

 She shared a video of her belly moving (Image: Twitter)

She revealed that on Thursday she will be having surgery to treat endometriosis, a condition in which tissue similar to the lining of the womb starts to grow in other places.

Chrissy tweeted: "My little Jack would have been born this week so I'm a bit off.

"I truly feel kicks in my belly, but it's not phantom.

 Chrissy said it might be her son Jack saying hello (Image: Twitter)

"I have surgery for endometriosis tomorrow...but the period feeling this month is exactly like baby kicks. sigh."

Her video showed her belly visibly moving as it kicked.

"Look at this," Chrissy captioned the post, adding a sad-faced emoji.

"I'll pretend it's him saying hi - it never stops."

 She shared her grief with fans after the tragedy (Image: CHRISSY TEIGEN via REUTERS)

Chrissy shared her heartbreak at losing her son in posts she made back in October.

She wrote on Instagram : "Jack worked so hard to be a part of our little family, and he will be, forever.

"To our Jack - I'm so sorry that the first few moments of your life were met with so many complications, that we couldn’t give you the home you needed to survive.

"We will always love you."