What are warning signs of ovarian hyperstimulation?

What does the evidence show for ovarian hyperstimulation syndrome?

• OHSS can involve fluid collecting in the abdomen or chest while the ovaries are enlarged. Symptoms range from mild discomfort to serious illness. A person who is drinking but urinating much less still needs assessment; fluid intake alone does not show that circulation and kidneys are coping. 1
• Risk assessment considers ovarian reserve, hormone conditions and the expected response to stimulation. Clinicians can tailor medication doses, protocol and trigger choices to lower risk. These decisions belong to the fertility team, not to adjustments made from an online dosing guide. 2
• Pain after egg retrieval has more than one possible explanation, including bleeding or infection. Report fever, pelvic pain or heavy bleeding after IVF procedures rather than assuming every new symptom is OHSS. The clinic needs to decide which assessment is appropriate. 3
• Stimulation is also used for egg or embryo preservation, so symptom instructions matter even when no fresh pregnancy attempt is planned. Obtain the clinic’s after-hours contact and escalation plan before retrieval, particularly when the expected ovarian response is high. 4
• Pregnancy can prolong or worsen OHSS, and the clinic may defer embryo transfer when risk is concerning. Ask for a specific monitoring plan for weight, urine output and symptoms. Severe illness may require hospital care rather than simply resting and drinking more at home. 1

When should I call my provider about ovarian hyperstimulation syndrome?

Contact the fertility clinic urgently for worsening abdominal swelling or pain, rapid weight gain, markedly reduced urine output or inability to keep fluids down. Seek emergency care for breathing difficulty, chest pain, fainting or severe pain. Fever or heavy bleeding after retrieval also needs prompt assessment for other complications.