Speaking to Stella magazine, the Australia's Got Talent judge admitted that she had struggled to lift her baby Ethan, who she gave birth to in July last year.
Minogue explained: "My thyroid stopped working and I had appendicitis. Leading up to that, I was getting thinner and thinner and stressing because I didn't know what it was.
"Normally you put on weight if you have an under-active thyroid but there is a percentage of people that have it reversed. It got very hard to concentrate, you can't sleep and I got very weak.
"I was finding it hard to pick Ethan up and I was thinking, 'I'm a new mum, I know I'm tired but surely it can't be this hard?'
"When you've just had a baby you think it must be normal tiredness but it got to the point where I thought, 'This can't be normal'."
When asked whether she would consider having more children following the issue, the 39-year-old added: "Maybe, yes.
"But honestly until I get my health back on track it's not a possibility. Meanwhile I turn 40 this month. I do see babies and think, 'Yummy'."
> Dannii Minogue: 'I thought I'd die after health scare'