Blac Chyna plans to drop 70lbs in weight after she gives birth.

The 28-year-old glamour model - who is expecting her first child with her fiancé Rob Kardashian - currently weighs 183 lbs and hopes to reach 200 pounds when she delivers her baby, but she has admitted she is already planning to reach her ''goal weight'' of 130 lbs after her pregnancy, which is nine pounds less than her pre-baby weight.

Blac detailed the size of her growing baby bump on Snapchat. She wrote: ''So I weighed in I'm 183lbs and loving it! So far I gained 84lbs.

''I truly believe I will be 200lbs when I delivery that's 17lbs away.

''So imma need to lose 70bs basically to be at my goal weight 130lbs (sic).''

The mother of two - who already has son three-year-old son King Cairo with her ex-boyfriend Tyga - has revealed she will embark on a ''strict diet'' and ''waist training'' to shed the baby weight and re-gain her slender frame once she gives birth.

She said: ''So imma need to lose 70bs basically to be at my goal weight 130lbs.''

And Blac has admitted she thinks she will be able to lose the weight quickly.

Speaking previously, she said: ''My goal is to gain, like, 100 pounds this pregnancy. Imma tear it up, then Imma snap back.''

Meanwhile, the 29-year-old 'Keeping Up With the Kardashians' star has revealed he has spent $13,000 on Blac's pregnancy cravings, including Philly cheesesteak, in just one month in order to satisfy her urges for a meaty treat.

Speaking previously Blac said: ''I feel like I don't have any pregnancy cravings, though.''

But Rob corrected her and said: ''What do you love to eat? What do I always order you?''

Chyna replied: ''Philly cheesesteak, P.F. Chang's.''

But Rob admitted he relies on food delivery app Postmates ''every day'' and asked how much his bill is, he admitted: ''I think one month, it got to like, $13,000.''