this post was submitted on 15 Nov 2023
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Science

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[โ€“] [email protected] 15 points 1 year ago* (last edited 1 year ago) (1 children)

1 in 50 million chance... world population of 8 billion... average yearly birth rate of 19 per 1000... that would make it 3 per year of these cases! I wouldn't've expected so many double-featured individuals being out there ๐Ÿ˜ฏ

[โ€“] [email protected] 8 points 1 year ago (1 children)

Article also said last time it happened was in 2019. Surprised there hasn't been any for nearly 4 years.

[โ€“] [email protected] 1 points 1 year ago (1 children)

Yeah, it also says there is a 0.3% of females thought to have the condition. The numbers don't seem to fit.

[โ€“] [email protected] 2 points 1 year ago

Assuming 53% of population are females that is 12.7 million with the condition. Using your 19/1000 that's 241k babies a year under this subgroup. Maybe it is 1 in 50 million chance for those 241k babies a year? Still seems off though I did pull the 53% out of my butt but I vaguely remember there being a slightly higher % of females in the total population.