Ovarian hyperstimulation syndrome (OHSS) is a medical condition that can occur in some women who take fertility medication to stimulate egg growth, and in other women in very rare cases. Most cases are mild, but rarely the condition is severe and can lead to serious illness or death. Signs and symptoms
Symptoms are set into 3 categories: mild, moderate, and severe. Mild symptoms include abdominal bloating and feeling of fullness, nausea, diarrhea, and slight weight gain. Moderate symptoms include excessive weight gain (weight gain of greater than 2 pounds per day), increased abdominal girth, vomiting, diarrhea, darker urine, decreased urine output, excessive thirst, and skin and/or hair feeling dry (in addition to mild symptoms). Severe symptoms are fullness/bloating above the waist, shortness of breath, pleural effusion, urination significantly darker or has ceased, calf and chest pains, marked abdominal bloating or distention, and lower abdominal pains (in addition to mild and moderate symptoms). Complications
OHSS may be complicated by ovarian torsion, ovarian rupture, venous thromboembolism, acute respiratory distress syndrome, electrolytes imbalance, thrombophlebitis and chronic kidney disease. Symptoms generally resolve in 1 to 2 weeks, but will be more severe and persist longer if pregnancy occurs. This is due to human chorionic gonadotropin (hCG) from the pregnancy acting on the corpus luteum in the ovaries in sustaining the pregnancy before the placenta has fully developed. Typically, even in severe OHSS with a developing pregnancy, the duration does not exceed the first trimester. Cause
Sporadic OHSS is very rare, and may have a genetic component.
Disorder may refer to randomness, non-order, or no intelligible pattern. Disorder may also refer to:

Healthcare
Disorder (medicine), a functional abnormality or disturbance
Mental disorder or psychological disorder, a psychological pattern associated with distress or disability that occurs in an individual and is not a part of normal development or culture:Anxiety disorder, different forms of abnormal and pathological fear and anxiety
Conversion disorder, neurological symptoms such as numbness, blindness, paralysis, or fits, where no neurological explanation is possible
Obsessive–compulsive disorder, an anxiety disorder characterized by repetitive behaviors aimed at reducing anxiety
Obsessive–compulsive personality disorder, obsession with perfection, rules, and organization
Personality disorder, an enduring pattern of inner experience and behavior that deviates markedly from the expectations of the culture of the individual who exhibits it

Law enforcement
Civil disorder, one or more forms of disturbance caused by a group of people
Lawlessness, a lack of laws or law enforcement

Science
Crystallographic disorder, disordered atom locations in crystals
Order and disorder

Arts, entertainment, and media
Films
Disorder (1962 film), a film by Franco Brusati
Disorder (2009 film), a Chinese documentary
Disorder (2015 film), a French film

Music
Disorder (band), a Bristol-based hardcore punk band
Disorder (album), an album by The Gazette
Disorder (EP), an EP by Front Line Assembly
"Disorder", a song by Joy Division from the 1979 album Unknown Pleasures

Other uses
Dis-order, the mail order service of Displeased Records

See also
Chaos
Order