She wore one of her old bras to show how much her body has changed over the years.
The 32-year-old model, from Germany, also told her 59,000 Facebook followers that she wants her breasts to be “as big as the Titanic”.
She said: “I wore this bra before my first breast augmentation. The bra is size 70DD (32DD). In the meantime it is not big enough to cover my nipples.
“Sometimes I am amazed by my self how much my breasts have grown in the last time
“But that’s not enough for me! I will pump my breasts even bigger, Biggger and BIGGGGER until they are as big as the Titanic.”
Fans backed Martina’s plastic surgery plans, with dozens liking the post.
One commenter said: “Go bigger baby girl. Life is too short to have small breasts. I’m behind you.”
Another said: “Beautiful Jessica Rabbit.”
And a third added: “I am sure you can do much better and make these two boobs look tiny.”
While many supported the model’s curvy dreams, others shared concerns that bigger boobs would be detrimental to Martina’s health.
One responder worried: “Isn’t this dangerous to your health?”
Another asked: “Why are you doing this to yourself. This is sad.”
A third queried: “Are they not heavy? Comparing to your body size?”
A fourth theorised: “This is too much at the moment. This will probably kill you.”
And another simply said: “You need to stop.”