It's the night before the screening call, and you're reading forum threads instead of sleeping.
Everyone says the same thing.
Very rare. Only 1%.
One donor heard exactly that, then landed in the ER twice with severe OHSS.
So who was that number for?
Rare Compared to What
You've probably asked that already.
You asked the agency rep if it was safe.
You got "extremely safe" and a personal story.
No data came with it.
You deserved a figure.
So you went looking, and what you found doesn't match.
What the 1% Line Leaves Out
Donors in one survey said they were told "very rare, only 1% of donors."
One of them ended up in the ER twice with severe OHSS.
Look at what that line skips.
It doesn't say which OHSS. Mild, moderate, severe, or critical.
It doesn't say whether the figure is per cycle or per donor.
A number with no denominator can't be checked.
Which is where the surveys get uncomfortable.
The Numbers Donors Report
One cycle-inclusive donor survey found 39% moderate OHSS.
It found 12% severe.
It found 1.38% critical.
Set that beside 1%.
Clinics cite lower per-cycle figures, and that disagreement is real.
Nothing here proves anyone lied on purpose.
But the gap exists, and you're the one who'll sign.
Fair Reasons to Doubt a Survey
Donors who had trouble may be more likely to answer a survey. That's a fair point.
The opposite worry also stands.
Official counts of severe cases may run low, because not every OHSS level is reported to regulators.
So neither side has a clean number.
That's why you ask this clinic for its own, in writing.
And it's why the word "rare" starts to look strange.
A Sales-Stage Word
"Rare" does its work before the contract, not after the ER.
A medical measurement names a condition, a denominator, and a time frame.
"Rare" names a feeling, and the feeling keeps a donor moving toward a signature.
The trouble comes when that feeling meets an actual body.
What Mild Means Once You're There
One donor's OHSS was labeled mild.
She was admitted overnight anyway.
She was told it wasn't a big deal.
Another donor gained about 10 pounds in two days and spent roughly two weeks recovering.
Plenty of donors come through and call it manageable.
Still, those stories don't fit "just a few days off."
When Bloating Stops Being Just Bloating
One donor told her nurses about heavy bloating.
Several times, she was told it was common.
Then came fluid drainage and pressure on her lungs.
Bloating is common. That part was true.
She never got a line for when common turns into an emergency.
Donors end up asking Reddit whether painful breathing after retrieval is routine.
The worst version of that night happens far from the clinic.
The Night Nobody Plans For
One donor sat alone in a hotel room after a 63-egg retrieval.
She was struggling to breathe.
Surgery to drain fluid was being considered for the next morning.
Her plan had been "contact the center if symptoms develop."
That's a phone number and a hope.
Then comes the question nobody answered at signing.
Who Pays When It Goes Wrong
Donors and commenters ask whether agencies cover ER or ICU stays.
One donor's coverage reportedly ended 30 days after the procedure.
Recovery doesn't watch the calendar.
One donor was hospitalized for nearly a month and had to relearn how to walk.
Another gained 17 pounds in six days and had seven liters drained.
The fluid came back.
Maybe It Was Just Her Body
You might think some bodies are simply more sensitive.
Some donors were told exactly that, or that they were "super fertile."
One was relieved at 12 eggs, then told the number was "low."
Others saw 43 eggs, then 53, then worse.
A strong response is real, but the protocol, the monitoring, and the egg target are choices someone made.
One donor went to a different clinic and did fine.
That points at the protocol, not at her body.
Which Story Is Yours
Every thread has a horror story and a happy one.
Both are true.
Some donors finish proud of the family they helped, with a recovery they'd call manageable.
Others sit in an ICU.
Stories can't tell you which one you'll be.
A donor was told her first near-fatal event was "just a fluke accident," signed again, and ended up in the ICU.
The money hadn't covered what came next.
So the real question is what you ask before you sign.
What to Ask Before You Sign
Ask for this clinic's rate of ER visits and hospital stays, per cycle.
Ask for mild, moderate, severe, and critical OHSS counted separately.
Ask who pays for an ER visit or ICU stay, with no 30-day cutoff, in writing.
Ask for a named person and a number that picks up at 2 a.m.
Ask for follow-up booked before retrieval, and a meeting with the retrieving doctor first.
Ask what happens if you stop mid-cycle.
Then watch how fast the answers come.