Chorea gravidarum is a rare movement disorder characterized by involuntary, irregular, jerky movements that occur during pregnancy. The term literally means "chorea of pregnancy" and represents a form of chorea that emerges in women during gestation, typically in the second or third trimester[@gomes2020]. This condition is not a single disease but rather a manifestation of various underlying disorders that become symptomatic during pregnancy due to hormonal, metabolic, and immunological changes[@speelman2019].
The disorder was more commonly diagnosed in the pre-antibiotic era when rheumatic fever was prevalent. Today, it is encountered much less frequently due to improved treatment of streptococcal infections and rheumatic heart disease, though it remains an important diagnostic consideration in pregnant women presenting with abnormal movements[@walker2021].
Chorea gravidarum is a rare condition, estimated to affect approximately 1 in every 2,000-5,000 pregnancies[@gomes2020]. The peak incidence occurs in primigravidae (first-time pregnant women) between the ages of 20 and 30 years[@speelman2019]. The condition typically appears during the second or third trimester, though it can present as early as the first trimester in some cases[@walker2021].
Chorea gravidarum is a rare movement disorder characterized by involuntary, irregular, jerky movements that occur during pregnancy. The term literally means "chorea of pregnancy" and represents a form of chorea that emerges in women during gestation, typically in the second or third trimester[@gomes2020]. This condition is not a single disease but rather a manifestation of various underlying disorders that become symptomatic during pregnancy due to hormonal, metabolic, and immunological changes[@speelman2019].
The disorder was more commonly diagnosed in the pre-antibiotic era when rheumatic fever was prevalent. Today, it is encountered much less frequently due to improved treatment of streptococcal infections and rheumatic heart disease, though it remains an important diagnostic consideration in pregnant women presenting with abnormal movements[@walker2021].
Chorea gravidarum is a rare condition, estimated to affect approximately 1 in every 2,000-5,000 pregnancies[@gomes2020]. The peak incidence occurs in primigravidae (first-time pregnant women) between the ages of 20 and 30 years[@speelman2019]. The condition typically appears during the second or third trimester, though it can present as early as the first trimester in some cases[@walker2021].
Historical data from the early 20th century suggest that chorea gravidarum accounted for a significant proportion of movement disorders in pregnancy. Modern series are limited given the rarity of the condition, but available evidence suggests the incidence has decreased substantially since the advent of antibiotics and improved maternal healthcare[@piccoli2018].
The pathophysiology of chorea gravidarum is multifactorial and relates to the complex physiological changes of pregnancy that unmask or exacerbate underlying neurological conditions[@speelman2019]:
Pregnancy induces significant changes in sex hormones, particularly estrogen and progesterone. These hormones can modulate dopamine receptor sensitivity and alter neurotransmitter metabolism in the basal ganglia[@walker2021]. Estrogen has been shown to increase dopamine receptor density in striatal regions, potentially contributing to hyperkinetic movements.
In many historical cases, chorea gravidarum was linked to prior rheumatic fever, particularly Sydenham chorea that remitted and then recurred during pregnancy[@gomes2020]. The immunological cross-reactivity between streptococcal antigens and neuronal tissue (molecular mimicry) leads to basal ganglia dysfunction that can be reactivated by the immunological stress of pregnancy.
Pregnancy creates a state of relative immune suppression followed by rebound immune activation. This immunological turbulence can trigger autoimmune phenomena affecting the central nervous system[@speelman2019]. Additionally, the hypercoagulable state of pregnancy may contribute to microvascular changes in the basal ganglia.
Some cases appear to represent new-onset chorea in women with underlying genetic susceptibility, such as mutations in genes associated with familial choreas (e.g., [HTT](/proteins/huntingtin) for Huntington disease, ATP1A3 for alternating hemiplegia of childhood)[@walker2021].
The characteristic movement disorder consists of involuntary, irregular, jerky movements that are randomly distributed throughout the body[@gomes2020]. These movements:
Symptoms typically develop gradually over days to weeks[@walker2021]. In most cases, chorea gravidarum is self-limited and resolves within weeks to months after delivery. However, recurrence in subsequent pregnancies is common, and some women may develop persistent movement disorders[@piccoli2018].
Diagnosis is primarily clinical, based on the characteristic movement disorder occurring during pregnancy[@gomes2020]. A thorough history should include:
Initial workup[@speelman2019][@walker2021]:
Consider genetic counseling and testing for Huntington disease or other hereditary choreas when onset is atypical or there is a family history[@speelman2019].
| Condition | Key Features |
|------------|---------------|
| Sydenham chorea | Usually pre-pubertal, associated with rheumatic fever |
| Huntington disease | Progressive, family history, cognitive decline |
| Wilson disease | Kayser-Fleischer rings, liver disease |
| Antiphospholipid syndrome | Thrombosis, pregnancy loss, thrombocytopenia |
| Drug-induced chorea | Temporal relation to medications |
| Thyrotoxicosis | Weight loss, tachycardia, heat intolerance |
Treatment must balance the severity of movements with the safety of the fetus[@gomes2020][@walker2021]:
First-line agents[@speelman2019]:
Most cases resolve after delivery[@gomes2020]. Planning for delivery should include:
The prognosis for chorea gravidarum is generally favorable[@walker2021]:
With modern management, fetal outcomes are generally good[@speelman2019]:
Recent research on Chorea Gravidarum includes: