Ohss what is

After several days, third-space fluid begins to re-enter the intravascular space, hemoconcentration reverses and natural diuresis ensues. Intravenous fluids may be tapered as the patient's oral intake increases. Complete resolution typically takes days from the onset of initial symptoms. OHSS is a self-limiting disease. Therefore, treatment should be conservative and directed at symptoms.

Medical therapy suffices for most patients. Women with severe symptoms often require intensive medical care. Surgery is necessary only in extreme cases, such as in the case of a ruptured cyst, ovarian torsion or internal hemorrhage.

Augments activity of antithrombin III and prevents conversion of fibrinogen to fibrin anddoes not actively lyse but can inhibit further thrombogenesis. It prevents reaccumulation of clot after spontaneous fibrinolysis. The prognosis is excellent if OHSS is mild or moderate.

In severe OHSS, the prognosis is optimistic if good treatment is given. In risk situations the patient should be informed about possibilities such as cancelling, coasting and freezing embryos for subsequent replacement.

When signs of OHSS occur, the patient must be adequately informed and hospitalization should be proposed at the slightest deterioration. Registration of all cases of severe OHSS and their outcome should become compulsory in all ART programs and also after every ovulation induction. Source of Support: Nil. Conflict of Interest: None declared. National Center for Biotechnology Information , U. J Hum Reprod Sci. Author information Article notes Copyright and License information Disclaimer.

Address for correspondence: Dr. E-mail: ude. This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3. This article has been cited by other articles in PMC.

Abstract Ovarian hyperstimulation syndrome OHSS is an iatrogenic complication of assisted reproduction technology. Keywords: Human chorionic gonadotrophin, ovarian hyperstimulation, intravascular depletion. Secondary risk factors A number of ovarian response parameters have been evaluated for their ability to predict the development of OHSS,[ 6 ] including absolute levels or rate of increase of serum E2, follicular size and number, and number of oocytes collected.

Ascites and tense distention Leakage of fluid from follicles, increased capillary permeability leading to third spacing due to the release of vasoactive substances , or frank rupture of follicles can all cause ascites. Localized or generalized peritonitis Localized or generalized peritonitis is caused by peritoneal irritation secondary to blood from ruptured cysts, protein rich fluid, and inflammatory mediators.

Acute abdominal pain It may be due to ovarian torsion, intraperitoneal hemorrhage or rupture of cysts. Dyspnea Pulmonary function may be compromised as enlarged ovaries and ascites restrict diaphragmatic movement. Hypercoaguable state It is likely due to hemoconcentration and hypovolemia resulting from fluid to third space shift. Electrolyte imbalance Extravasation of fluid and resultant renal dysfunction resulting from decreased perfusion leads to oliguria. Acute renal failure The hypovolemia of OHSS leads to hemoconcentration and creates a hypercoagulable state.

Classification To understand OHSS and its management, one must first be aware of its classifications of severity. Administration of macromolecules i Albumin administration Prophylactic albumin administration may interrupt the development of OHSS by increasing the plasma oncotic pressure and binding mediators of ovarian origin.

Insulin-sensitizing agents Insulin resistance with compensatory hyperinsulinemia is thought to play a pathophysiological role in the ovarian dysfunction[ 22 ] and hyperandrogenism[ 23 ] associated with PCOS. Moderate hyperstimulation Treatment of moderate OHSS consists of observation, bed rest, provision of adequate fluids and sonographic monitoring of the size of cysts.

Severe hyperstimulation One should transfer the patient to a different center if no one who is experienced in managing severe OHSS is available at the present location. Resolution After several days, third-space fluid begins to re-enter the intravascular space, hemoconcentration reverses and natural diuresis ensues. Surgical care OHSS is a self-limiting disease. Medication Anticoagulant These agents inhibit key factors involved in thrombogenesis. Heparin Augments activity of antithrombin III and prevents conversion of fibrinogen to fibrin anddoes not actively lyse but can inhibit further thrombogenesis.

If symptoms are present, a transvaginal or abdominal ultrasound can be done to measure ovary size and the amount of fluid collected. OHSS can be serious, so careful monitoring and managing the symptoms are important whenever it occurs. Office visits for ultrasound exams to measure the ovaries and fluid in the abdomen, and blood tests, are routinely done. Decreased activity and drinking lots of electrolyte-rich fluids over ounces per day are recommended.

Medicines for nausea are available. If there is fluid in the abdomen, drainage of fluid using a syringe paracentesis can provide significant relief in most cases. On occasion, more than one drainage is helpful. A medicine called cabergoline also can reduce the fluid accumulation.

There is rarely a need for hospitalization. If OHSS does not improve with outpatient care, the woman may be treated in the hospital with close monitoring. In the rare case that you develop severe OHSS, you will probably need to go to a hospital. The provider will give you fluids through a vein intravenous fluids.

They will also remove fluids that have collected in your body, and monitor your condition. Most mild cases of OHSS will go away on their own after menstruation starts. If you have a more severe case, it can take several days for symptoms to improve. If you are getting injections of fertility medicines, you will need to have regular blood tests and pelvic ultrasounds to make sure that your ovaries aren't over-responding.

Catherino WH. Reproductive endocrinology and infertility. Goldman-Cecil Medicine. Philadelphia, PA: Elsevier Saunders; chap Fauser BCJM. Medical approaches to ovarian stimulation for infertility. Philadelphia, PA: Elsevier; chap Lobo RA. Infertility: etiology, diagnostic evaluation, management, prognosis. This may indicate an urgent situation that needs prompt medical attention.

The cause of ovarian hyperstimulation syndrome isn't fully understood. Having a high level of human chorionic gonadotropin HCG — a hormone usually produced during pregnancy — introduced into your system plays a role.

Ovarian blood vessels react abnormally to HCG and begin to leak fluid. This fluid swells the ovaries, and sometimes large amounts move into the abdomen. During fertility treatments, HCG may be given as a "trigger" so that a mature follicle will release its egg.

If you become pregnant during a treatment cycle, OHSS may worsen as your body begins producing its own HCG in response to the pregnancy. Injectable fertility medications are more likely to cause OHSS than is treatment with clomiphene, a medication given as a pill you take by mouth.

Occasionally OHSS occurs spontaneously, not related to fertility treatments. Sometimes, OHSS happens in women with no risk factors at all. But factors that are known to increase your risk of OHSS include:. Severe ovarian hyperstimulation syndrome is uncommon, but can be life-threatening. Complications may include:. To decrease your chances of developing ovarian hyperstimulation syndrome, you'll need an individualized plan for your fertility medications.

Expect your health care provider to carefully monitor each treatment cycle, including frequent ultrasounds to check the development of follicles and blood tests to check your hormone levels.