Physical Health Problems
Fetal Valproate Spectrum Disorder (FVSD) can affect many different body systems. Some individuals may have visible physical differences from birth, while others develop difficulties gradually over time. The type and severity of symptoms vary greatly between individuals.
Below are some of the physical health problems that may be seen in people affected by FVSD.
Congenital Heart Defects
Some individuals exposed to valproate during pregnancy are born with structural differences in the heart. These can range from mild conditions requiring monitoring to more serious defects needing surgery or long-term medical care. Symptoms may include breathlessness, fatigue, poor feeding in infancy, or reduced exercise tolerance.
Kidney and Urinary Tract Problems
Differences affecting the kidneys or urinary system may occur in some individuals. These can sometimes lead to recurrent urinary infections, difficulties with bladder function, or kidney-related health concerns that require monitoring.
Spinal and Skeletal Differences
Some people with FVSD may have differences involving the spine, ribs, joints, or overall skeletal structure. These can include scoliosis, curved upper spine, altered posture, chest wall differences, or abnormalities affecting the limbs, hands, fingers or feet.
Joint Hypermobility and Musculoskeletal Problems
Joint hypermobility means joints move beyond the typical range. This can contribute to pain, instability, fatigue, injuries, poor posture, coordination problems, and reduced physical endurance. Some individuals may also experience ankle tightness, knee instability, muscle weakness, altered gait, or chronic musculoskeletal pain.
Low Muscle Tone (Hypotonia)
Low muscle tone can affect strength, posture, coordination and stamina. Babies may appear “floppy,” while older children and adults may tire easily, struggle with balance, handwriting, physical tasks, or maintaining posture for long periods.
Delayed Motor Development
Some children may take longer to reach physical milestones such as sitting, crawling, walking, climbing stairs, or developing fine motor skills. Difficulties with coordination may continue into adulthood and affect everyday functioning.
Fine Motor Difficulties
Fine motor problems can affect small hand movements needed for tasks such as handwriting, fastening buttons, using cutlery, tying shoelaces, opening packaging, or using tools and technology.
Feeding and Oral Motor Difficulties
Some individuals experience feeding difficulties in infancy or childhood. Problems may involve sucking, chewing, swallowing, gagging, food texture sensitivities, or poor oral muscle coordination. Reduced posterior tongue tie or altered tongue movement may also affect feeding and speech.#
Gastrointestinal Problems
Families frequently report gastrointestinal difficulties including reflux, chronic constipation, abdominal pain, bloating, nausea, feeding difficulties, or irritable bowel symptoms. These issues may significantly affect comfort, appetite, sleep, and quality of life.
Sleep Disturbances
Sleep difficulties may include insomnia, poor sleep quality, restless sleep, difficulty settling, frequent waking, or excessive daytime fatigue. Poor sleep can worsen concentration, behaviour, pain, emotional regulation and physical stamina.
Chronic Fatigue and Reduced Stamina
Some individuals experience significant fatigue that affects education, work, social activity and daily functioning. Physical or mental exertion may lead to prolonged exhaustion and slower recovery times.
Balance and Coordination Difficulties
Difficulties with balance, coordination and spatial awareness may affect walking, sports, climbing stairs, driving, handwriting, and general confidence in movement.
Visual and Sensory Difficulties
Some people may experience visual processing difficulties, squints, depth perception problems, sensitivity to light, or difficulties interpreting visual information. Sensory processing differences may also affect touch, sound, movement, texture or pain perception.
Dental and Oral Health Problems
Dental difficulties reported in some individuals include poor enamel quality, overcrowding, delayed tooth eruption, differences in tooth shape or positioning, jaw alignment problems, and increased dental fragility. Oral motor difficulties may also affect speech and chewing.
Frequent Infections and Immune-Related Concerns
Some families report recurrent infections or prolonged recovery from illness. Possible immune system involvement has been discussed by some clinicians and families, although further research is needed to better understand whether this forms part of the wider FVSD spectrum.
Headaches and Neurological Symptoms
Some individuals experience chronic headaches, migraines, tremors, coordination difficulties, altered sensation, or other neurological symptoms that may affect daily life and wellbeing.
Multi-System Health Difficulties
For some individuals, multiple health problems may occur together. The combined effect of physical, neurological, sensory and developmental difficulties can significantly affect mobility, independence, education, emotional wellbeing, employment and overall quality of life.
Because FVSD is a spectrum condition, not every person will experience all of these difficulties, and symptoms may change over time as life demands increase.