The 36-year-old posted a screenshot of an app on her Instagram Stories showing the current size of her baby.
"Almost there," the Flip Or Flop star wrote above the snapshot.
The pic revealed that her baby is the size of a mini watermelon and that Christina is 38 weeks along.
It also showed that her son currently weighs 7 lbs. and measures 19 inches.
The real estate investor is expecting her third child with husband Ant Anstead. The couple married in 2018 after she split from ex-husband Tarek El Moussa.
Christina also is a mom to daughter Taylor and son Brayden with her Flip Or Flop costar.
Are you excited for Christina to give birth? Sound off in the comments below!