How far Along Am I??

[Iluvmymonsters]

My case has been a odd one for all 3 of my doctors & now wed 3/16 2 of my doctors changed how far along I am. My quick history is this. My period (which I belive to be my pre pregnancy cycle) began aug 26th or 27th and ended in full mid day sept 5th. I found out I was preghnant mid sept but none of m doctors could give me a clear date seeing as I had monthly bleeding till December every 3 1/2 weekks on the dot!  As of March 13th 2011 I was thinking I was 29 weeks on that date. But when I went for my check up on the 16th my head ob said I was 34 weeks.  I saw my specialist later that same day & her new measurements came back as 31 weeks. But none of them have given me a excact due date or conception date. I also had some major weight loss in my 2nd trimester upwards of about 25lbs. Compared to my 1st visit in mid sept till my last visit on the 16th it only looks as thought ive gianed 4lbs since aug which means ive gained a total of 18lbs since losing that 25lbs. Im so lost can anyone offer any thoughts as to how far along I am & when I might of concived???

[ku111]

How much does the baby weigh at this point?  If you saw a "specialist" they are probably pretty accurate depending on measurements of the baby and how well it was visualized.  What are your uterine measurements?  Any date can be off by a couple of weeks.  This is why inductions are not until 38 weeks because you could be 36 weeks or 40.  This would be confusing and harder to plan.  Goodluck!

[JoyRenee]

All dates are estimates so they won't be able to give you an exact date. Because of the bleeding during pregnancy it is hard to know when you may have conceived. Later sonograms can be off significantly (by 1-2 weeks or more rarely 3 weeks). I would ask the doctor if they're going to go by their date or by the specialist's date. More than likely they will go by the specialist's date as they may have used better technology and have more expertise in measuring babies. How much you've gained won't matter; some women lose weight and some gain 50 lbs by the time they are full term.

[AnnieBrooke]

Without an earlier ultrasound, from maybe 8 weeks pregnant, there is really no way to be certain from an ultrasound now.   The ultrasound now could possibly date it to within about a two-week period from when you conceived, but nothing can be more accurate at this date.