OHSS (ovarian hyperstimulation syndrome)
60-second summary
OHSS happens when the ovaries react too strongly to fertility medicines. They swell and fluid leaks into the belly. Most cases are mild and settle on their own, severe OHSS is rare, and doctors have good ways to prevent it. Breathlessness, very little urine or severe pain need hospital care right away.
OHSS: how serious is it?
| Symptoms | Bloating, mild tummy pain | More swelling, nausea, vomiting | Breathlessness, very little urine, severe pain, leg swelling |
|---|---|---|---|
| What to do | Rest, fluids, call clinic if worse | Contact the clinic the same day | Go to the nearest hospital now — call 108 or 112 |
| Higher risk | PCOS/PMOS, high AMH, many follicles | Same | Same, especially with pregnancy |
Ovarian hyperstimulation syndrome can happen after stimulation or the trigger. Severe OHSS is an emergency.
Source: KedVia original diagram · KedVia medical illustration team