Why do we calculate the length of a pregnancy from the first day of a women’s last period?
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Because you could have gotten pregnant at any time after that period ended. You’re technically more likely to get pregnant during ovulation but there have been cases of getting pregnant when the last time she had sex was in the middle of her period because the Soren survived long enough.
TLDR the last day of your last period is the last day you can *guarantee* that you weren’t pregnant.
Becuase that’s the start of her last cycle and it’s a known date. It’s important to note that they still base your due date as if you ovulated on day 14, which many women don’t. I always did around day 18. That’s also why when you have an early ultrasound they then change the due date based on how it’s measuring. Probably ovulated at a different time and then conceived at a slightly different time
Becuase that’s the start of her last cycle and it’s a known date. It’s important to note that they still base your due date as if you ovulated on day 14, which many women don’t. I always did around day 18. That’s also why when you have an early ultrasound they then change the due date based on how it’s measuring. Probably ovulated at a different time and then conceived at a slightly different time
When a woman becomes pregnant, the first day of her last menstrual period (LMP) is used as a starting point to calculate the length of her pregnancy. This is because the actual date of conception can be difficult to pinpoint, but the first day of the last period is a reliable and consistent marker to use. This information is used to monitor fetal development, track milestones, and plan for labour and delivery.
During a menstrual cycle, the uterus prepares for a potential pregnancy by building up its lining. If conception does not occur, the lining sheds and a woman gets her period. However, if an egg is fertilised by sperm during this time, it will implant in the uterus and start to grow into a fetus. This is a good [podcast](https://open.spotify.com/episode/4mgZ4etwET7slFQuoyrSTv) from the BBC about it
When a woman becomes pregnant, the first day of her last menstrual period (LMP) is used as a starting point to calculate the length of her pregnancy. This is because the actual date of conception can be difficult to pinpoint, but the first day of the last period is a reliable and consistent marker to use. This information is used to monitor fetal development, track milestones, and plan for labour and delivery.
During a menstrual cycle, the uterus prepares for a potential pregnancy by building up its lining. If conception does not occur, the lining sheds and a woman gets her period. However, if an egg is fertilised by sperm during this time, it will implant in the uterus and start to grow into a fetus. This is a good [podcast](https://open.spotify.com/episode/4mgZ4etwET7slFQuoyrSTv) from the BBC about it
Becuase that’s the start of her last cycle and it’s a known date. It’s important to note that they still base your due date as if you ovulated on day 14, which many women don’t. I always did around day 18. That’s also why when you have an early ultrasound they then change the due date based on how it’s measuring. Probably ovulated at a different time and then conceived at a slightly different time
When a woman becomes pregnant, the first day of her last menstrual period (LMP) is used as a starting point to calculate the length of her pregnancy. This is because the actual date of conception can be difficult to pinpoint, but the first day of the last period is a reliable and consistent marker to use. This information is used to monitor fetal development, track milestones, and plan for labour and delivery.
During a menstrual cycle, the uterus prepares for a potential pregnancy by building up its lining. If conception does not occur, the lining sheds and a woman gets her period. However, if an egg is fertilised by sperm during this time, it will implant in the uterus and start to grow into a fetus. This is a good [podcast](https://open.spotify.com/episode/4mgZ4etwET7slFQuoyrSTv) from the BBC about it
It’s the only thing that we’ve been able to know with some degree of accuracy. Ovulation timeframes vary and sperm can live for days making the date of fertilization and implantation uncertain.
It’s the only thing that we’ve been able to know with some degree of accuracy. Ovulation timeframes vary and sperm can live for days making the date of fertilization and implantation uncertain.
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