Summary (tl;dr)

Jesy Nelson, former Little Mix member, has revealed that her eight-month-old twin daughters have been diagnosed with Spinal Muscular Atrophy (SMA) Type 1, a severe genetic neuromuscular disorder.

Essential Background

Jesy Nelson, a British singer, rose to fame as a member of the girl group Little Mix. In May 2025, Nelson and her fiancé, Zion Foster, welcomed twin daughters, Ocean Jade and Story Monroe, who were born prematurely at 31 weeks due to complications from twin-to-twin transfusion syndrome (TTTS).

The Full Story

On January 4, 2026, Jesy Nelson shared an emotional video on Instagram announcing that her eight-month-old twin daughters have been diagnosed with Spinal Muscular Atrophy (SMA) Type 1. This is described as the most severe muscular disease a baby can get, affecting every muscle in the body, including those used for breathing and swallowing. Nelson explained that the diagnosis came after months of appointments and noticing her daughters were not showing typical leg movement and struggled to feed properly. Doctors have informed her that the twins may never walk or regain neck strength and will be disabled, with an untreated life expectancy of not past the age of two. The twins have since begun their treatment plan at Great Ormond Street Hospital. Nelson decided to share her story to raise awareness about early diagnosis and the potential benefits of routine heel prick tests at birth, which can detect the disease promptly.

Why It Matters

This news has brought significant attention to Spinal Muscular Atrophy (SMA) Type 1, a rare but devastating genetic condition. Nelson's decision to share her family's difficult experience aims to raise public awareness for early detection, potentially helping other parents identify symptoms and seek timely medical intervention for their children. Her story highlights the critical importance of early diagnosis, as treatments for SMA are most effective when started within the first weeks or days of life. The trend also underscores broader discussions around newborn screening protocols in countries like the UK, where routine heel prick tests for SMA are not yet standard, unlike in other nations.

Geographic Location

• Great Ormond Street Hospital, London, England, United Kingdom (twin daughters began treatment)
• Virtual/Online (Jesy Nelson announced the diagnosis via Instagram video)