Cardi announced her pregnancy in June, when she performed alongside her husband at the BET Awards.
The WAP hitmaker - who has 108 million followers on Instagram - proudly showed off her growing bump while performing Type S*** at the awards ceremony.
Cardi subsequently wrote on the photo-sharing platform: "#2! [heart emoji] (sic)".
The rapper previously explained that motherhood has given her more motivation than ever.
The chart-topping star revealed that she's determined to give her children the best possible chance of success.
Cardi - who worked as a stripper before finding success in the music business - explained: "All the time I'm thinking about my kid.
"I'm shaking my a**, but at the same time I'm doing business, I'm on the phone with my business manager saying, make sure that a percentage of my cheque goes to my kid's trust.
"I give my daughter so much love, and I'm setting her up for a future. I want to tell her that a lot of the s*** that I have done in life - no matter what I did, knowing that I wanted to have kids made me go harder to secure a good future for my kids."