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

A community of expecting mothers (18 to 24 Years Old) offering support through pregnancy and childbirth. Ask a question, join a conversation, share experiences.

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
Recent Activity
13996968_tn?1436166227
Blank
carlynicholebaker6565 uploaded a new photo
12 mins ago
5575813_tn?1428253630
Blank
OctoberMommy2014, and Hollus commented on cowgirlup249's status
3 hrs ago
5575813_tn?1428253630
Blank
specialmom, and Hollus commented on Sheaby's status
4 hrs ago
Blank
Weight Tracker
Track your weight throughout your pregnancy
Start Tracking Now
Blank
Pregnancy Tracker
Track your pregnancy
Start Tracking Now
Top Pregnancy Answerers
8377023_tn?1399512760
Blank
Allocate
10817881_tn?1422291120
Blank
Emalee132
Avatar_f_tn
Blank
katie_1989
Avatar_f_tn
Blank
Mommy2be_06_03
11587059_tn?1427631863
Blank
shaymich2015
Avatar_n_tn
Blank
Tavi12
Pregnancy: Ages 18-24 Community Resources
RSS Expert Activity
233488_tn?1310696703
Blank
Marathon Running Done Over Many Yea...
May 21 by John C Hagan III, MD, FACS, FAAOBlank
233488_tn?1310696703
Blank
New Article on Multifocal IOL vs &q...
May 21 by John C Hagan III, MD, FACS, FAAOBlank
748543_tn?1371753642
Blank
TMJ/TMJ The Connection Between Teet...
Jan 27 by Hamidreza Nassery , DMD, FICOI, FAGDBlank
Top Pregnancy Answerers
8377023_tn?1399512760
Blank
Allocate
10817881_tn?1422291120
Blank
Emalee132
Avatar_f_tn
Blank
katie_1989
Avatar_f_tn
Blank
Mommy2be_06_03
11587059_tn?1427631863
Blank
shaymich2015
Avatar_n_tn
Blank
Tavi12