Pregnancy dating lmp vs ultrasound

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  6. Ultrasound vs LMP (Due Date)!
  7. Ultrasound vs LMP (Due Date) - January Babies | Forums | What to Expect?

Since I was so concerned the doctor ordered blood work to check my levels. I go back tomorrow for more blood work to make sure my levels are doubling. I then am going back next week for another ultrasound doctor offered since she knew how concerned I was she said if my levels were normal then everything was ok. She said sometimes when it's this early it's hard to get a good angle to measure and next time I could be back on track.

Hopefully everything checks out and baby is growing ok!

How accurate is a due date that is determined by ultrasound?

Sometimes your body just ovulates differently than some cycles and you can also implant late as well! Even if your body is like clockwork every single month, it's never a sure thing. With my MMC in march, my baby was measuring almost 2 weeks behind I hope you get good news with your hcg, but honestly I don't think you have anything to be worried about! I had an ultrasound at what was supposed to be 7w6d. The ultrasound tech could only find the sac, and told me I was more like 4w5d. I was really confused by the dates, they didn't seem to make sense to me at all.

I had used an ovulation kit this time around, and was positive of the days I had ovulated. My midwife was not concerned at all, she said, it is very common to have the dates be off by at least two weeks.

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They told me to come back in three weeks when I would be measuring closer to 8w. I was freaking out, to make me wait three weeks seemed like an eternity. Not satisfied, I called my PCP, and he performed blood work. He said without having anything to compare it to, my levels were consistent with the results of the ultrasound and not to worry. Once you ovulate, fertilization can take place any time, upwards to two weeks, that's why most due dates change often. I pray everyday that when I go back next week, everything is on track.

I had a very similar experience with my 3rd pregnancy and it is so scary to wait.

Methods for Estimating the Due Date - ACOG

Thankfully, everything turned out great and she was born healthy. With my first pregnancy, my first HCG level was 25 and my OB extended my due date a week after the ultrasound results, saying I had just implanted at the time I would have gotten my period. My son was full term and now is a healthy 19 month old.

With this pregnancy, my usual 3 days spotting before my period occurred, but then it stopped, so I am assuming my implantation was at that time and my due date will be one week later; ultrasound next week will confirm. I wondered about this. I wondered if implantation date affected the fetal age and measurements since there is such a large range. The last menstrual period LMP was considered certain in 13, and uncertain in cases. The duration of pregnancy from the scan to the day of spontaneous delivery was predicted by crown-rump length, biparietal diameter BPD , and femur length FL using linear regression models, and the results were compared with estimates based on LMP.

At all gestational ages, ultrasound was superior to certain LMP in predicting the day of delivery by at least 1. When deliveries before 37 weeks were excluded, crown-rump length measurement of mm corresponding to I wish we went by LMP!! I'd have had my kid three days ago, but I'm not due for another 9 days!! I feel your pain!!! So, we're all stuck in a waiting game, unfortunately.

Predicting delivery date by ultrasound and last menstrual period in early gestation.

I think it was at 7 or 8 weeks that I had the dating ultrasound done. Based off of what I'm reading here, it's safe to expect baby on the later date just for my sanity. My cycles were longer than 28 days so it makes more sense that I'd be due on the 21st although I'm not happy about waiting even longer: As long as baby is measuring fine, then things are good and baby will come when ready, which is different for everyone: Oldest Newest 14 Posts.

Pregnancy Due Date Calculator: What to Expect When is your baby due? How big is your baby this week? Pregnancy Due Dates Find important information and fun facts about your pregnancy due date.

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