how accurate is ultrasound dating
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I'm a FTM but also a medical professional, so while I have 0 real pregnancy experience, I'm familiar with how accurxte of the medical sciences of pregnancy operate sometimes very arbitrarily! Hoping to make this thread to address some common concerns that some moms may have, and although I'm constantly worried myself, wanted to help alleviate some fears that arise simply due to doctors never taking the time to explain these things to us!
This method of dating based on LMP is very very old, before the days of advanced ultrasound. Back in the old days, there was no how accurate is ultrasound dating way of tracking ovulation, much less way to see babies as early as weeks. The only info available to doctors then was when you last had your period. Even today, most women likely don't need to track ovulation especially if they never had a fertility problembut most will know either exactly or approximately when they had their LMP. Imagine in the 18th century, doctors would ask "so when was your period", and if you said, "3 months ago", the doctor will expect you to give birth in about months.
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Yay modern science or lack thereof! When the doctor says you "should be 4 weeks" along, what they really means is, "if you ovulated on the 14th of your cycle, and today is day 28 of your cycle, and you tested positive for pregnancy, you are considered "4 weeks". Taking that logic, if you ovulated on day 13 of the cycle, you accrate be "4 week 1 day" because you're 1 day "ahead" of the textbook woman. So dating based on LMP tends to be ok, within a 1 week margin of error. how accurate is ultrasound dating
How Accurate Are Dating Scans At 11 Weeks - How accurate are your pregnancy due dates?
However, if you have PCOS, or just have one random weird cycle where you ovulated wayyyy off from the 14th of the cycle, then this dating method will be off. Which leads us to the next question Early in pregnancy, not much will be seen via an abdominal ultrasound. If you have an early weeks ultrasound, the technologist or doctor may choose a transvaginal ultrasound, because baby is still too little to be http://www.xgs.in/blog/dating-venezuelan-guys/dating-and-relationships-over-40.php via the abdomen.]
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