ultrasound accuracy??

[whiteroses24]

my first time i found out i was pregnant and had ulteasound done at 2 months. Doctor said lm due July 4 and then I went to clinic for prenatal care had an ultrasound done at 4 months and 3 months and they both came out for my due date June 26  Now I switched doctors to one closer to me and they told me the ultrasound at the clinic are not accurate and disregarded that. They said the hospital is accurate. Im confused??

[megmegcleve]

The most accurate reading is your very first ultrasound. It's much more accurate than your LMP and any ultrasounds after aren't as accurate because babies grow at different rates as they get bigger. Right now I'm 35 weeks but my baby is the size of a 38 week baby, which means I'm gonna have an almost 9lb kid when she gets here. They won't deliver her earlier because her lungs won't be developed all the way.

[whiteroses24]

thanks. my second ultrasound  my baby measured 11inches, they said he was long. I dont know my last cycle because I got pregnant on birth control(nuva ring). Right now im sticking  with the june 26 ultrasound. I am now seen my sister doctor and informedher of all of this and she said shes is going to help me figure it out cuz the other doctors will just see and I didnt feel a connection like this new doctor Im seen. So far the new doctor told me my baby is head down. :)  Thanks everyone  for your comments and wise advice.

[kkatmore]

The ultrasound made at around 7 weeks should be pretty accurate because the measurements are precise and equal to dates of development. The ones later on on week 16 and further can't be precise cos it depends on the baby,s specific development and its hard to measure now. But you have to figure out when you due date is. Try to remember when the last cycle was and your sexual activity during that month probably and compare  which ultrasound is more realistic. Consult with doctor. I wouldn't just let it go and I dint agree that two weeks difference is normal. It's known that if the baby is overdue by 2 weeks, the placenta starts to "die" and not give there baby food and oxygen. So its important to monitor you around your due date and a couple off dates might be not that important or matter if the baby is not yet born but 2 weeks, it's kind of a big deal. I m not trying to scary you but to be on the safe side, id figure it out with your doctor. And I just hope the baby comes on time for you no matter any estimations. Good luck.

[AmyW1976]

Due dates are nothing but estimates.  Ultrasounds being a week or 2 off is completely normal.   And can very from dr to dr etc.

[cjam0709]

Go by when the first day of your last period and put that date on this app. It will tell you your due date. If the baby is measuring a little long then your due date could be a little earlier, that's what happened with my last one.