Chrissy Teigen has taken to social media to reveal that she still "feels kicks in her belly" on what would have been her son Jack's birth week.
The model and cookbook author wrote on Twitter that she was feeling "a bit off" as baby Jack "would have been born this week".
"I truly feel kicks in my belly, but it's not phantom," she said, adding: "I have surgery for endometriosis tomorrow...but the period feeling this month is exactly like baby kicks. sigh."
Healthline reports that this can be because "stretching of the uterine cavity or abdomen in pregnancy increases the growth of nerve receptors", which has the effect of tricking the brain into thinking it's being kicked when it's not.
It adds: "While the mechanism behind flutter kicks is unknown, researchers believe it may be related to changes in the somatosensory homunculus – which basically means the nerves in your stomach are working in overdrive, without communicating with the rest of your body."
Chrissy also shared a video of her stomach contracting, writing: "Look at this. I'll pretend it's him saying hi – it never stops."
These heartbreaking tweets come after Chrissy and her husband John Legend lost their son Jack in September of last year.
A month later, Chrissy said that she was in a "bit of a grief depression hole" and penned a moving essay about the loss.
"A lot of people think of the woman in times like this but I will never forget that John also suffered through these past months, while doing everything he could to take care of me," she wrote.
"I am surrounded, in a human therapy blanket of love. I am grateful and healing and feel so incredibly lucky to witness such love."
In the essay, Teigen also addressed the intimate photographs that she and Legend shared in the wake of her miscarriage.
"I cannot express how little I care that you hate the photos," she said.
"How little I care that it's something you wouldn't have done. I lived it, I chose to do it, and more than anything, these photos aren't for anyone but the people who have lived this or are curious enough to wonder what something like this is like."