The 43-year-old and her rocker husband, Travis Barker, 46, have been candid about their struggle to conceive over the past year.
They also recently admitted Kardashian had given up on the IVF process, which had caused her to struggle with her energy levels.
In a new video of her doing a workout session that she posted to her Instagram, she captioned the post: "Finally started getting my energy back 10 months after stopping IVF.
“For anyone else going through it, it gets better!”
She added a series of smiling emojis and uploaded a time stamp from her workout.
The Poosh lifestyle founder shares children Mason, 13, Penelope, 10, and Reign, eight, with her ex, Scott Disick.
She married Barker - who has daughter Alabama, 17, and son Landon, 19, with ex-wife Shanna Moakler - in May 2022.
Kardashian and Barker tried IVF to expand their family but did not conceive during their first round.
Back in March 2022, Kardashian revealed on The Kardashians TV show: “Travis and I want to have a baby, and so my doctor took us down this road of doing IVF.
“It hasn’t been the most amazing experience.”
Referring to her weight gain from the treatment, she added: “Every single person on social media is always like, ‘Kourtney’s pregnant, Kourtney’s pregnant, Kourtney’s gained so much weight.’
“It’s so rude to comment on people when you have no idea what they’re actually going through.
“The medication they’re giving me, they put me into menopause... literally into menopause.”
Despite this, in December 2022, a source claimed to the US Sun that the couple was not giving up on their baby hopes.
The source said: “Travis and Kourtney would still love a baby together. They’re still trying.”