Her stomach was tight by day two.
By day four it looked five months pregnant.
She kept asking the clinic what was happening.
Nobody would tell her the number until the ER did.
Forty-three eggs.
That's the story that keeps showing up in donor forums, and it's why you're reading this at midnight instead of sleeping.
The number she wanted was never in the packet
You were told OHSS is rare.
You were not told what your actual retrieval count would be before it happened.
Donors describe finding out the number only after symptoms forced a hospital visit.
One retrieved 53 eggs and ended up in a medical coma for four days.
Another learned she'd produced 63 only once the pain made it impossible to ignore.
The count exists before the reaction starts.
It just doesn't get said out loud until the body forces the conversation.
Everyone keeps saying a different number
You've seen 1%.
You've seen 2%.
You've seen one in three.
That's not a typo.
It's not you misreading a chart either.
It's three different questions getting answered as if they were one.
What under 2 percent actually leaves out
ASRM cites 1 to 2 percent for severe OHSS.
That number is real.
It only covers the severe cases.
HFEA puts mild OHSS at about a third of donors.
So the "under 2%" your coordinator gave you wasn't a lie, exactly.
It left out everyone whose bloating, nausea, and pain didn't qualify as "severe" on paper.
Per cycle is not per donor
Here's the part that gets lost on the phone.
A per-cycle rate assumes one shot.
A donor who cycles twice, or three times, is not living inside a single percentage.
She's accumulating risk each time she signs another contract.
A repeat donor who sailed through cycle one can still face a harder cycle two, especially once her dose changes.
Nobody explained that the number resets differently for her.
Mild is doing a lot of work in that sentence
"Mild OHSS" sounds like a shrug.
Donors describe it as feeling six months pregnant, unable to sit up straight.
One described "bubbles around my collarbone" as fluid pressed toward her lungs.
Another's abdomen was described as the size of a basketball.
If that's mild, you deserve to know what severe actually costs.
Why the count comes after the swelling
The egg count isn't hidden on purpose, most of the time.
It's handled like an outcome, not a warning.
Clinics report the number once retrieval is done.
By then your body has already started reacting to it.
A donor with 43 eggs needed the ER the very next day.
The information arrived exactly when it stopped being useful for choosing anything.
The phone call that doesn't help
This is the part that makes donors distrust everything after.
Symptoms worsen, they call the clinic, and they're told to take painkillers and drink water.
Nurses often sound unsurprised, even though "rare" was the word used during counseling.
That gap between the calm voice and the actual body count is where trust breaks.
If you're worried an ER visit will turn up nothing and you'll be stuck with a bill you didn't expect, that fear belongs in this conversation too.
When a smooth first cycle means nothing about the second
A donor who had an easy first retrieval isn't guaranteed an easy second one.
Doses sometimes go up between cycles without a clear explanation of why.
One donor faced a genuinely dangerous second reaction after her dose changed.
Nobody had told her a higher dose meant a different risk profile.
Assuming your body already proved itself safe is the assumption that gets donors hurt twice.
What the forums know that the intake packet doesn't
A researcher who surveyed a small group of donors found 15 reporting moderate to severe OHSS.
The sample was small and self-selected.
But that pattern keeps repeating across independent threads, independent years, independent clinics.
One interview subject went further, saying nearly all the donors she'd spoken with had some form of it.
That's not proof of a hidden epidemic.
It is proof that "rare" doesn't match what donors are describing to each other.
Clinics quoting severe-OHSS-per-cycle and donors reporting cumulative mild-to-moderate cases might both be counting honestly.
They're just counting different things, and nobody has lined the two counts up side by side for you.
The question that gets a real answer
You asked your coordinator "how risky is this really" and got "rare."
That question was too open for a system built on percentages.
The question that gets a real answer is narrower.
Ask for the clinic's own historical rate, not the textbook one.
Ask whether that rate is per cycle or per donor.
Ask what counts as mild in their data, and what doesn't.
What to ask before signing your name
Ask now who pays for hospitalization from OHSS, before you're the one calling from an ER waiting room.
Ask what symptom, specifically, means call now instead of wait and see.
Ask whether they use a GnRH-agonist trigger, since it's associated with lower OHSS risk than the alternative.
Ask why a second cycle's dose might change before you agree to a third.
None of these questions are rude.
They're the ones the "under 2%" line was never built to answer.
Consenting with your eyes open
You still don't have one figure that tells you exactly what your body will do.
No packet, no forum thread, no single study settles that for you tonight.
But you know which questions produce a real answer instead of a reassurance.
You know the word denominator matters more than the word rare.
Ask for your clinic's own numbers, split by mild and severe, cycle and donor.
If they can give you that, you'll know more than most people signing this contract.
If they can't, that tells you something too.
Either way, the swelling, if it comes, was never something nobody could have named in advance.