Millie Radford has been urged to be tested for anaemia after shocking fans with her "pale" appearance.
The teen, daughter of Sue, 45, and Noel Radford, 49, is expecting a baby girl in September.
And with weeks to go until the birth of her baby – who she has already named Ophelia – fans have questioned if she might have low iron levels.
Millie, 18, appeared in a video posted to the family-of-22's YouTube channel, where she was seen eating a sandwich as her family enjoyed the fresh air around her.
However, as originally reported by the Mirror, fans were concerned by her complexion, and were quick to comment on the video, titled Picnic With A View, that it was worth getting checked out.
One wrote: "Millie looks really pale, it might be worth her having a blood test to check her iron levels.
"I didn't realise my iron levels dropped at 33 weeks and I'm 36 weeks now and my iron tablets have made me feel like a new woman!
"Midwife said it's so common at the end of pregnancy for them to drop! It could just be the lighting on the camera though."
It seems that the possibility of anaemia was also on her parents' minds.
A comment from the official Radford channel replied: "Yes I said the same to her the other day and she’s very tired so she’s going to get her blood checked."
Millie is the seventh oldest Radford child, and announced her pregnancy in March, shortly before mum Sue gave birth to her 22nd child, Heidi.
She shared her happy news on Instagram, where her announcement post racked up 11,800 likes.
The baby was conceived during a six-month relationship with an unnamed partner.
The pair have since split, but her ex has vowed to be a part of the little one’s life.
After finding out she was pregnant, the teen was nervous to break the news to her parents.
She told Fabulous: “My parents have always seen me as the ‘good girl’. They are not strict but I knew that telling them would make it real.
“Thankfully, they weren’t disappointed. They were excited.”
The huge family, who live in Morecambe, Lancashire, are loved by fans for their honesty about home life – and that their giant brood isn't funded by benefits.