Kim Kardashian's baby bump suddenly got huge

We couldn't help but notice that Kim Kardashian's baby bump is all of a sudden much bigger in her latest pregnancy selfie.

The 34-year-old shared this snap of herself cradling her growing bump on Instagram, captioning it: "Good night baby".

Last week, the reality TV star shared another mirror selfie of herself without pants on, but had a much smaller bump. So where did it come from?

Earlier this month, Kim wrote to Twitter that the size of her belly fluctuates as the day goes on. 

Kimye's second bundle of joy is due to join his sister North, 2, this December.