Measuring week behind?

Question

Hi all- LMC was 12/17 and projected due date was 9/23. Had 7 week ultrsound today and measured at 5w6d with a heartbeat of 98. Due date is now 10/1 . I have another ultrsound next week to verify proper growth but doctor left me worried.  Anyone else have similiar history wth measuring behind?

Thanks!

Answer

Wanted to provide a follow up for everyone who commented. We had another ultrasound today and the baby grew perfectly and heartbeat is now 135! Even got to hear it! Measuring 7w1d and doctor finally agreed that we just ovulated late. Such a relief!

Answer

I was 8+2 for my first US (based on ovulation by BBT) but measured 7+4. The nurse said as long as the dates were within a week they didn't worry about it and did not adjust my EDD.

Answer

When I have gone in for my 8 week scan with all 3 pregnancies they all measured at 6 weeks. I think because my cycles are 33-34 days, longer than the average calculation that drs and online calculators use. Doctors never seemed to be worried about it. They would just adjust my due date in the computer. You should be fine.

Answer

I went on jan 26 for my first ultrasound I was suppose to be 7w3d that day but baby measured at 6w3d with a heartbeat of 128. The nurse seemed ok with it bc I told her I knew I had ovulated later that month.

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Maybe you conceived later than you thought when you ovulate. I am sure everything will work out! Best wishes!

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I had a long chat with my midwife the other day.. She said that they go by the date from your LMP but if for any reason you have early scans the dates could change as growth can happen at any time up until 12 weeks.. Also if you have irregular periods, you could have ovulated late, so that could be another reason! I'm not having my first scan till 12 weeks (which seems like a lifetime away) but she said that at 12 weeks the baby is more of a general size and easier to date, but before then there is such a minimal difference in size between the weeks it is harder to give it an exact measurement! Don't get me wrong, some may be accurate, but if there are any discrepancies then babies can develop and have growth bursts at different stages! Hope that all makes some sense?

Answer

My doctor today said I'm about 7w5dbut I know I ovulated 1/1/15 which puts me at 6w6d so I'm expecting my ultrasound to "measure behind." I do have about a 35 day cycle and ovulate about cd21. Her calculation would be right IF I had a 28 day cycle and ovulated about a week earlier (which I know I didn't cuz I chart BBT). I wouldn't worry a whole lot yet :)

Measuring week behind?

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