Accuracy in Ultrasound?

Question

My Original question was not stated clearly and i should have been more precise with my question (and i do thank those who responded..Thanks A lot)

My new question is this...

I have irregular periods. I found out via blood test on April 24th that i was approximately 5-6 weeks.

On April 30.2008 I had an Ultrasound that confirmed that i was 7 weeks and 2 days.

On June 5.2008 I had another Ultrasound that confirmed that i was 12 weeks and 4 days

On July 21.2008 I had my last Ultrasound that confirmed I was 18 weeks and 5 days.

Now when you total them all up I get an estimate of approx. 24 Weeks and 3 days (as of August 26.2008).

Now according to my doctor, I am due December 14.2008 and My LMP was March.10.2008. I did have sexual intercourse with another man In February (i believe around the 15th) and then i had intercourse with another man in March (the person in March that i had intercourse with is my partner and we have had un-protected s*x for the last 2 years). I truly believe that it is my partner's baby that i had s*x with in March because due of the calculations my Dr has given me.

I do need help in determining if there is any way i am further along pregnant than i already am (meaning the man in February would be the father) or according to all the Ultrasounds i have had, it may seem accurate (which would mean it is my partner's baby)

I am scared and I know a DNA is available

but, are they are suggestions or opinions??

Thanks + please respond without judgement

Answer 1

I have a pregnancy wheel, I will tell you what it says:

Worked out with the information given and it says your last period was about March the 17th, so your ovulation and fertilization date would be end of March/beginning of April.

Hope this helps.

Answer 2

the ultra sounds cannot be wrong. they go by measurement, so good luck.