Trimester timeline: calculating pregnancy weeks to months - The Mother Baby Center
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Learn what to expect throughout pregnancy from the first weeks to the final months and how to prepare for delivery at The Mother Baby Center.

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

  • cuerdo@lemmy.worldOPEnglish
    101·
    2 days ago

    how the baby’s body is going to chage fast in the first week?

    You bet, it might be going from not existing to existing, that is some change.

    It is really awkward, but it is due to a practicality, it is very easy to pinpoint last menstruation, but very hard to know when conception happened.

    • hendrik@palaver.p3x.deEnglish
      81·
      2 days ago

      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.

      • dfyx@lemmy.helios42.deEnglish
        12·
        2 days ago

        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.

        • hendrik@palaver.p3x.deEnglish
          1·
          2 days ago

          Sure, thanks for all the comments. Sometimes I write stuff before thinking it through. Guess my learning is some day I’ll have to look up the proper method of doing it. I still found the article to be very confusing. It’s clearly not meant for experts. But unless you’re one, the statements there seem to mix what happens after conception and the other timeline so I find it to be confusing to me. But I can read up on it and learn something as well.

        • hendrik@palaver.p3x.deEnglish
          2·
          2 days ago

          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 😆