The presenter and model shared a smiling snapshot of herself appearing on the show alongside a lengthy caption, which began: "Had a great time last Thursday @loosewomen and look forward to joining the panel again tomorrow!"
She went on: "I feel I need to expand on the subject of so-called CIO (Cry-it-out) that I briefly touched on."
The blonde beauty, who is married to Rod Stewart, continued: "My husband and I agreed that as I was breastfeeding every few hours, our baby Alastair (along with Aiden when he later came along) should be in his cot at the side of our bed but not in our bed (I cheated a few times [wink emoji])."
WATCH: Penny Lancaster shocks by feeding pet goat from her mouth
At the age of 4 months we made the transition of having him in his own room to help him sleep more independently.
However this didn’t stop him waking any less and sleep deprivation was becoming a real struggle for me."
Penny is a fan favourite on the ITV show
The mum-of-two went on to detail how she and Rod used the technique under the supervision of their paediatrician, which involved weaning him off his night-time feeds and letting him cry himself to sleep "over 2/3 nights" before, as Penny explained, "he slept the whole night through!!!!"
The star went on: "There is no one-size-fits all approach… CIO or as I like to call it, teaching self-soothing (at the right time) is truly a gift of nighttime sleep that will really help long term."
Penny and Rod share two children
The 49-year-old's followers were quick to support her, with several posting heart emojis in response.
One wrote: "I used this technique when I put my daughter in her own room."
A second added: "Best thing I ever did. Took 3 nights then sorted. Xxx."
Others commented: "Exact same with my youngest," and: "Controlled crying worked, thank god!"
Penny and Rod's oldest son Alastair is now 15 while Aiden is ten.
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