Chrissy Teigen remembers her late son Jack on what would have been the week of his birth

• Chrissy Teigen shared an emotional tweet about her late son Jack ahead of a planned surgery.
• The model said she was feeling "kicks" in her belly that reminded her of being pregnant with Jack.
• She lost Jack in September due to pregnancy complications, and has been publicly grieving him since.

Chrissy Teigen marked the expectant birth week of her late son Jack in a heartbreaking message.

In an emotional tweet, Teigen said she was experiencing "kicks" in her belly ahead of a planned surgery - reminding her of her baby, who she miscarried in late September.

"my little jack would have been born this week so I'm a bit off," the cookbook author wrote on Wednesday. "I truly feel kicks in my belly, but it's not phantom."

Teigen said she has endometriosis surgery planned for the morning, and her most recent period felt "exactly like baby kicks. sigh."

In a subsequent tweet, she shared a video of her stomach moving, apparently due to cramps. "I'll pretend it's him saying hi - it never stops," Teigen captioned the clip.

Teigen also asked followers about the recovery time for endometriosis surgery, and wondered if she'd be able to "make soup after."

The emotional tweet came after a period of public mourning for Teigen and her family, who lost their unborn baby Jack after Teigen was hospitalized for excessive bleeding.

Read more: Chrissy Teigen says 'we are okay' after sharing she lost her baby with husband John Legend

"We are shocked and in the kind of deep pain you only hear about, the kind of pain we've never felt before," the model captioned an emotional Instagram post about the miscarriage.

"We were never able to stop the bleeding and give our baby the fluids he needed, despite bags and bags of blood transfusions. It just wasn't enough."

"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," Teigen continued.

The "Cravings" author has two children with husband John Legend - Luna, 4, and Miles, 2.

• Read more:
• Chrissy Teigen explains why it was important for John Legend to photograph her on the day she lost her pregnancy
• Chrissy Teigen shares the 'cutest' thing her daughter Luna did to honor her late brother Jack
• John Legend dedicated an emotional BBMAs performance to Chrissy Teigen following her pregnancy loss