It's 2 a.m. and you have two tabs open.
One says "I was fine."
The other is a hospital story.
Both feel true, and neither tells you what "severe OHSS is rare" means for you.
Stay a few minutes. This piece separates what is known about severe OHSS from what people assume.
Everyone agrees OHSS can come back
Donors who had moderate OHSS go back for another cycle.
The worry in those threads is that the risk compounds.
That worry is fair, and it deserves a straight look.
A repeat is a question with handles on it.
Whether the damage lasts is a different question.
That one has no handles at all.
The repeat risk has levers you can ask about
Some donors report a hospitalized first cycle followed by a symptom-free second one.
What changed was a medication adjustment.
Donors name other levers too: a GnRH-agonist trigger, modest egg counts, and dose adjustment.
Those are questions a clinic can answer out loud.
Some donors have smooth cycles, and the aim is to make yours one of them.
That is the known side of the ledger. The other side is bigger.
What "severe OHSS is rare" leaves out
Clinics and agencies quote the risk for the whole population.
The donor who lands in the hospital lives it as a 100% event.
A population number can't tell you which donor you'd be.
One donor learned years later that her clinic's OHSS language was more reassuring than donor survey data suggests.
That gap is where your small voice comes from.
A retrieval that "went fine" can still turn
Severe OHSS can strike after a retrieval that went fine.
One donor had 63 eggs retrieved and was alone in a hotel afterward.
She felt "bubbles around my collarbone."
She struggled to breathe.
Surgery to drain the fluid was nearly performed the next day.
Another donor spent about two weeks unable to eat, drink or walk.
That hotel room is never in the ad.
Then comes the question with no answer
One donor was 23 when she developed severe OHSS.
Years later she lists cysts, endometriosis requiring surgery and precancerous tumors.
She can't prove the donation caused any of it.
Nobody can prove it didn't.
As one donor put it, "They never studied the long term effect of egg donation."
Whether one severe episode raises the risk of later reproductive problems, or only of OHSS again, is unanswered.
"No known long-term effects" means nobody has looked
Ask a clinic about long-term effects and you may hear there are none known.
Readers hear that as no risk.
It means no one has looked.
Clinics owe you that translation.
One donor found only OHSS and surgical infection on her consent form.
Endometriosis, cysts and fertility loss were never on it.
So donors do what anyone does without data. They compare stories.
Two explanations, and no way to pick
Did the donation cause the disease, or reveal what was already there?
One donor had stage IV endometriosis found months after a second donation.
Her doctor said she likely had mild disease that hormones made extreme.
That is a real answer, and it doesn't clear the donation.
Another doctor described stimulation for someone with endometriosis as "pouring gasoline on your endometriosis status and symptoms."
Neither explanation is comfortable, and the data to choose between them doesn't exist.
Why the stories split down the middle
One donor delayed a month for cysts found at screening.
She noticed "absolutely no long-term change."
Another had 36 eggs retrieved and says, "the donation definitely pushed my body into PCOS."
A third had 18 eggs from one ovary and 21 from the other.
She calls her first period afterward "the worst pain of my life."
Twenty or more eggs is a common target.
How much egg count, trigger type and protocol change your risk is still unanswered.
Screen for endometriosis before you apply
Some donors had severely painful periods before donating and were never evaluated.
Ask the clinic what screening it requires, and tell them if your periods are severe.
One donor's screening cysts were put down to hormonal contraception.
She moved forward without knowing whether that fully explained them.
Ask what explains anything they find.
Screening first turns a gamble into a decision.
You can't know which story you'd be
Every story you read could be an outlier in either direction.
That is true, and I won't pretend otherwise.
So stop trying to predict which story you are. Change what is changeable instead.
One donor looked back and said:
"I was young, and the concept of health as a fragile thing didn't register with me, I felt invincible."
"Young and healthy" turned out to be a guess.
A doctor told another donor her second donation "should be her last."
She brushed it off.
A milder second cycle after a dose change is real, but it only answers the repeat question.
Keep your own records
One donor's advice is short: "Really document everything."
Write down your cycle dates, egg counts and medications.
No registry or aftercare contact follows donors years later.
So you are the record.
One donor's GP called her worsening symptoms PMS.
A dated file gives the next doctor something to read.
Proof of cause may never come, and the file still matters.
Questions to ask before you sign
Bring these to the first call.
Ask which protocol they will use.
Ask which trigger medication, and why.
Ask what egg count they aim for.
Ask what the cancellation criteria are.
Ask exactly what happens if you develop OHSS.
Ask who you call when you are alone in a hotel or at home in pain.
Ask what they screen for, including endometriosis.
Ask what the consent form says about cysts, endometriosis and fertility.
Ask who follows up with donors, and for how long.
Write them down tonight. Then make the call.