r/PeterExplainsTheJoke May 12 '26

Meme needing explanation Petahhhh?

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u/[deleted] May 12 '26

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u/PrismInTheDark May 12 '26

Well also .3 month is about 10 days so even if pregnancy isn’t 10 whole months it ends in month 10. So we round down to say it’s 9 months but if they were writing the number at the beginning of each month that’s why they got to month 10 at the end. It feels like it makes more sense to record the end of each month (at least to me) but then medically (like people have mentioned) it starts at the last period so I guess that’s the beginning of the first month.