The time of pregnancy is calculated from the first day of your last menstrual period (LMP), which is typically two weeks before conception actually occurs. This means the first two weeks of the 40-week count are before fertilization, during which your body prepares for ovulation and a new cycle begins
And this new calculation adds some arbitrary weeks so they say a normal pregnancy will last up to 10 months. And then they say 10 months is late… Maybe this “article” is AI slop? I’m not an expert on pregnancy, but I’d say a lot in the text is more confusing than proper, practical math… At the end you’d be 9 months pregnant and depending on what paragraph from the article you’re referring to, the baby is due any day now… or it’s still 4 weeks to go, maybe even more if it’s late.
Maybe it is not best explained, but the theory is accurate, another link: https://americanpregnancy.org/healthy-pregnancy/week-by-week/pregnancy-week-1-2/
Thanks, that one makes a bit more sense. And I mean the two things, the menstrual period and conception are linked… So there’s that 😆
You’re not wrong about knowing you’re not an expert.
None of this is new science
There is no “new calculation”. This is how medical professionals have calculated weeks of pregnancy for decades if not centuries. The reason is that it’s a lot more reliable than going by date of conception (which is not necessarily the date the parents had sex. Sperm can take days to reach the egg).
Source: I’ve spent 12 years writing accounting and quality management software for midwives.