Pregnancy 18-24 Community
can a ultrasound be wrong?
About This Community:

This patient support community is for discussions relating to pregnancy and childbirth in women age 18 to 24.

Font Size:
A
A
A
Background:
Blank
Blank
Blank
Blank Blank

can a ultrasound be wrong?

i had a ultrasound on jun 28 2011 and it said i was 13weeks 0days, so i counted back 13 weeks and it said i conceived about march 28 or 29, but i had a period apr 7 and it lasted about 5 days(normal) for me. i took 2 hpt at the end of apr around the 25 for the first 1 and 28 the second 1 and both were neg. i got a pos test on may 3 so im very confused at this point and i still question my due date which is jan 3 2012 and according to my lmp i should be due about jan 11 or 12 that almost 10 days and my ob keep saying is ok????? but im not ok with the dates
Blank
Avatar_f_tn
The accuracy of your ultrasound will depend on the quality of the equipment and the experience/skill of the person doing the exam.

Also, gestational age and fetal age are slightly different. Gestational age is usually based on your last menstrual period...but actual conception (and thus actual fetal age) takes place about 2 weeks or so AFTER the start of your last menstrual period. SO...if you are 13 weeks gestation, conception took place approximately 11 weeks before.

With that in mind, I get an approximate conception date of April 12...looks as though you may have ovulated early so using the LMP date to estimate due day may not work...IF the ultrasound is accurate.

You should be having another, more comprehensive ultrasound right around now. It is usually scheduled for around 18-20 weeks.
Related Discussions
4 Comments Post a Comment
Blank
134578_tn?1404951303
Don't count back 13 weeks from a pregnancy date given you by an ultrasound if you are trying to figure out when you conceived.  Medical dating counts back to your presumed first day of your last cycle, not to your conception date.  
Blank
Avatar_f_tn
The accuracy of your ultrasound will depend on the quality of the equipment and the experience/skill of the person doing the exam.

Also, gestational age and fetal age are slightly different. Gestational age is usually based on your last menstrual period...but actual conception (and thus actual fetal age) takes place about 2 weeks or so AFTER the start of your last menstrual period. SO...if you are 13 weeks gestation, conception took place approximately 11 weeks before.

With that in mind, I get an approximate conception date of April 12...looks as though you may have ovulated early so using the LMP date to estimate due day may not work...IF the ultrasound is accurate.

You should be having another, more comprehensive ultrasound right around now. It is usually scheduled for around 18-20 weeks.
Blank
Avatar_f_tn
that seems to make a little more sense to me... and thats a good reason because the ultrasound tech did indeed seem to really not know what she was doing and when i got my 2nd ultrasound aug 8 i had the same tech and it was the same issue some else had to be called in to assist her and help her as well.far as the ovulating early i kinda thought so myself so when i ask my doc she explained the its kinda unlikely do the fact my lining of the uterus having even prepared to bulid back up frm the bleeding (idk) something in that form.. i never heard that you ovulate a day or two after your period stops??
Blank
Avatar_f_tn
You ovulate about 14 days before the start of your period. So if you ever have a short cycle (say 24 days from the first day of one period to the first day of the next and you ovulate 14 days before the start of that second period...if your period lasts 5 days you ovulated 5 days after your period ended. If you have a very short cycle it is possible to ovulate within a few days of the end of your period.

I hope this helps.
Blank
Post a Comment
To
Blank
Weight Tracker
Weight Tracker
Start Tracking Now
Pregnancy 18-24 Community Resources
RSS Expert Activity
242532_tn?1269553979
Blank
Emotional Eating Control: How to St...
Aug 28 by Roger Gould, M.D.Blank
233488_tn?1310696703
Blank
New Cannabis Article from NORTH Mag...
Jul 20 by John C Hagan III, MD, FACS, FAAOBlank
242532_tn?1269553979
Blank
3 Reasons Why You are Still Binge E...
Jul 14 by Roger Gould, M.D.Blank
Top Pregnancy Answerers
Avatar_f_tn
Blank
knufrio
7283364_tn?1401049650
Blank
GeekMom1213
ME
Avatar_f_tn
Blank
loveontop2014
7677085_tn?1395377675
Blank
doulamommy
UT
9442948_tn?1406820051
Blank
babyberry000
7552771_tn?1399774290
Blank
ericatoday
victorville, CA