"This is the reality of how I have looked every day for 9 months, debilitated by nausea, bedridden and at times hospitalised," she says of the images.
"HG has made this much wanted and longed for pregnancy an incredibly tough journey and I’ve been happy to hide away and keep it to myself but now that I can see the finish line in sight, I feel it might be of some benefit to other sufferers to discuss it so no one else feels alone."
Fifi explains that although the easiest way to describe hyperemesis gravidarum is to say it's "severe morning sickness", that label doesn't even touch the surface of the condition.
Watch Amy Schumer's graphic experience with hyperemesis gravidarum below...
"It is a terribly isolating journey of chronic nausea with no relief," Fifi continues. "I have felt poisoned every second of this pregnancy, it’s like having gastro every minute, every hour of every day for nine months. It is possibly the greatest mental and physical challenge of my life. And the only way through it is my daughter’s smiling face every day, the support of incredible friends and family, and knowing that each day I’m getting closer to this much wanted, longed-for baby angel 👼🏼."
But Fifi had an important messages for other mums in the same situation.
"So for any other sufferers out there I hear you, I feel you and I know what you’re going through."