Mrs Robb, 26, has been invited to speak to MSPs to outline her concerns about the care offered to mothers suffering hyperemesis gravidarum.
She launched a petition at Holyrood and will now address the Public Petitions Committee. She wants the Scottish Government to consider placing hyperemesis specialist nurses in hospitals throughout Scotland to support thousands of pregnant women suffering from the condition.
She said: "I'm delighted that note is being taken of the situation that women can find themselves in.
"It's a horrific ordeal that can last for weeks or months. I feel this is a huge leap forward."
Mrs Robb vomited up to 40 times a day when she was pregnant with daughter Eilidh, who was born in May 2010. She was rushed to hospital and told she was lucky to be alive because her blood was not clotting.
Mrs Robb, who lives with husband Steve in Errol, Perthshire, said she sympathised greatly with the Duchess.