We analyzed 546 gender reveal guesses. Your family is flipping a coin.
Grandma swears she knows. Your best friend is never wrong. We checked 546 real guesses from 95 online gender reveals against the actual outcomes — the folklore did not survive.
The findings
What 546 real guesses revealed
Every number below comes from anonymized votes on real reveals — no surveys, no estimates.
Guests barely beat a coin flip
Of 503 guesses on reveals with a verified outcome, only 266 were right.
correct guesses — a coin lands right 50% of the time
Team Girl edges the vote
Across all 546 guesses, families lean pink before they know.
Online reveals out-attend living rooms
Median 43 voters, record 78 — roughly double a typical in-person party. 43% happen on weekends.
average voters per reveal
The crowd beats the individual
In reveals where at least 5 guests voted and a clear majority formed, the majority called it right 7 times out of 9. Small sample — flagged honestly — but your family is collectively smarter than any single member. Except that one aunt.
The calendar
Sunday is reveal day
Where 95 reveal dates landed across the week. The weekend owns 43% of all reveals — and Wednesday is when nothing happens.
Reveal moments cluster between mid-afternoon and evening — the most common scheduled hours in the sample were 15:00–18:00 and 21:00–00:00 UTC, the windows where US afternoon and European evening overlap.
An odd quirk
of reveals in our sample announced a girl
67 girls to 27 boys across 94 completed reveals — while real-world births run roughly 51% boys. A self-selection quirk of who hosts online reveals, not biology. Guess accuracy was unaffected: 53.1% right when it was a boy, 52.7% when it was a girl.
By the numbers
Every stat in one place
| Guesses analyzed | 546 |
| Reveals in sample | 95 |
| Guesses on verified outcomes | 503 |
| Individual guess accuracy | 52.9% |
| Guesses that said "girl" | 51.5% |
| Guesses that said "boy" | 48.5% |
| Crowd majority record | 7 of 9 correct |
| Average voters per reveal | 49.6 |
| Median · record voters | 43 · 78 |
| Weekend reveals | 43% |
| Girl outcomes in sample | 71.3% |
How guess accuracy compares
Old wives’ tales (belly shape, cravings, heartbeat)
Random chance — tested repeatedly against birth records
Party guests (this study)
503 real guesses, verified outcomes
Crowd majority, 5+ votes (this study)
Small sample — an early signal, honestly labeled
Anatomy scan ultrasound (18–22 weeks)
Medical imaging
NIPT blood test (from 10 weeks)
Medical gold standard
The folklore methods your guests rely on have been tested against birth records many times — see our full breakdown of gender prediction myths vs science. Spoiler: only medicine beats the coin.
What it means
Three takeaways from the data
Individual intuition is folklore
Across 503 verifiable guesses, accuracy landed at 52.9% — within noise of a coin flip. Belly-shape theories, heartbeat myths and craving folklore, measured at scale, contribute nothing.
The crowd is smarter than its members
While individuals flip coins, the majority verdict went 7 for 9 in reveals with five or more votes. Small sample, flagged openly — but it matches what forecasting research finds everywhere: aggregation beats intuition.
Online reveals doubled the guest list
An average of 49.6 voting guests per reveal simply does not happen in a living room. Distance is why these parties moved online — the data shows the move worked.
For journalists & writers
Licensed CC BY 4.0 — free to cite with a link back
According to data from RevealTogether, which analyzed 546 guesses across 95 online gender reveals, guests correctly predict the baby's sex only 52.9% of the time — barely better than a coin flip.
Need a custom cut of the data, a quote, or charts for your piece? team@revealtogether.com — we answer fast.
FAQ
Questions people ask about the data
How accurate are gender reveal guesses?
Based on 503 guesses cast on reveals with a known outcome, guests picked the right answer 52.9% of the time — statistically almost identical to flipping a coin (50%). Neither "mother's intuition" proxies nor family knowledge appear to give guests a meaningful edge.
Do more people guess boy or girl at gender reveals?
Girl, by a small margin. Across 546 guesses on RevealTogether, 51.5% of guests voted "girl" and 48.5% voted "boy". The Team Girl lean is consistent but slight.
Is the crowd majority usually right about the baby’s sex?
In our sample it was: in 9 completed reveals where at least 5 guests voted and a clear majority formed, the majority was right 7 times out of 9. That is a small sample, so treat it as an early signal rather than a law — individual guessers, measured across 500+ guesses, do no better than chance.
How many people typically join an online gender reveal?
In our data, an average online reveal gathers 49.6 voting guests (median 43). The most-attended reveal in the sample collected 78 votes — far more people than most in-person parties can host, which is the core reason families run reveals online.
When do most gender reveals happen?
43% of the reveals in our sample were scheduled on a Saturday or Sunday. Sunday alone accounts for 21 of 95 reveals (22%) — the single most popular day — followed closely by Saturday (20). Wednesday is the quietest day with just 7. Start times cluster in the afternoon-to-evening window, matching when extended families across time zones can realistically gather on their phones.
What is the most popular day of the week for a gender reveal?
Sunday. In our sample of 95 reveals, Sunday hosted 21 reveals (22%), narrowly ahead of Saturday (20). The midweek trough lands on Wednesday (7 reveals). If your family spans time zones, a Sunday afternoon slot is what most hosts converge on.
Are more reveal babies boys or girls?
In our sample, strikingly more girls: 67 of the 94 completed reveals (71.3%) announced a girl, versus 27 boys. Real-world births run roughly 51% boys, so this is a self-selection quirk of who hosts online reveals — not biology. Our accuracy analysis is unaffected: guessers were equally mediocre for both sexes (53.1% right when it was a boy, 52.7% when it was a girl).
Where does this data come from?
From anonymized, aggregated voting records on RevealTogether, a synchronized online gender reveal platform. We analyzed a sample of 95 reveals containing 546 guest votes. No names, emails, or identifying information were used — only vote counts and outcomes. Full methodology is described at the bottom of this page.
Methodology
How this study was built
Source: anonymized, aggregated voting records from online gender reveals hosted on RevealTogether between September 2025 and June 2026.
Sample: 95 reveals containing 546 guest votes. Internal test reveals were excluded before analysis.
Accuracy analysis uses only the 503 decisive (boy/girl) guesses cast on reveals whose actual outcome is recorded on the platform.
Crowd-majority analysis includes completed reveals with at least 5 decisive votes; ties excluded. The small sample size (9) is reported transparently.
No personally identifying information — names, emails, locations — was used at any point. Only vote counts, timestamps, and outcomes.
Known limitations: the sample skews toward families who host reveals online (see the 71% girl-outcome quirk above); day-of-week and hour figures reflect scheduled reveal times in UTC; crowd-majority analysis is directional until the sample grows.
Figures were last recomputed on June 29, 2026. The page is refreshed as new reveals complete — the dataset grows with every reveal hosted on the platform.
Keep reading
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Gender prediction myths vs science
Every old wives’ tale, tested against the evidence
Games30 gender reveal games and activities
Put your guests’ 52.9% accuracy to the test
BudgetWhat a gender reveal really costs
From $50 DIY to $1,500 premium, line by line
PlanningThe week-by-week reveal checklist
Everything to do from 8 weeks out to day-of
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