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Blac Chyna is bumping along...

The 28-year-old glamour model, who is expecting her first child with fiancé Rob Kardashian, showcased her growing bare baby bump in a close-up video posted on her Snapchat Thursday.

"Hey baby. What are you doing in there? Huh?" she said.

Blac Chyna had also showcased her bare baby bump in a mirror selfie posted on Snapchat last week.

She and Rob, 28, announced her pregnancy in May, a month after they got engaged. The two stepped out as a couple in late January. 

Blac Chyna, Rob Kardashian, Engaged

Xavier Collin/Image Press/Splash

Blac Chyna and Rob know the sex of their baby, as does her mother Tokyo Toni, but have not announced it publicly. Her mom also took to Instagram Tuesday to say the two are not expecting twins.

Blac Chyna also shares a 3-year-old son, King Cairo, with her ex Tyga. The boy often makes appearances in his parents' Snapchats. In videos posted last month, he quizzes his mother on the baby and offers name suggestions.

Blac Chyna uses the app daily and has documented much of her pregnancy there, showcasing meals she eats and even her weight gain. She said in a recent video she is having a "really good pregnancy, similar to King's."

Her and Rob's journey to joint parenthood will be shown on a new E! docu-series. The two will also appear in an E! special celebrating the birth of their child, the first of a new generation to carry the Kardashian family name.

Watch the new E! docu-series Rob & Chyna when it premieres later this year!