question-icon

First day of my last period was on 12/29/19 I

default
Posted on Wed, 6 Mar 2019
Question: First day of my last period was on 12/29/19 I had an ultrasound on feb 5 which said I was 6wk 1d pregnant. wouldn't I have been on my period at that time?
doctor
Answered by Dr. Michelle Gibson James (1 hour later)
Brief Answer:
there is a small margin of error

Detailed Answer:
HI, thanks for using healthcare magic

Early ultrasounds in pregnancy are considered to be fairly accurate. According to Medscape (professional medical website) and an article entitled Issues in Pregnancy dating, there is a small margin of error of approximately 8%.

Some sites quote a margin of just over one week.

This means, that if the bleeding was truly a period and not implantation bleeding, that the ultrasound may be slightly inaccurate.

I hope this helps, feel free to ask any other questions
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
Answered by
Dr.
Dr. Michelle Gibson James

General & Family Physician

Practicing since :2001

Answered : 16811 Questions

premium_optimized

The User accepted the expert's answer

Share on
First day of my last period was on 12/29/19 I

Brief Answer: there is a small margin of error Detailed Answer: HI, thanks for using healthcare magic Early ultrasounds in pregnancy are considered to be fairly accurate. According to Medscape (professional medical website) and an article entitled Issues in Pregnancy dating, there is a small margin of error of approximately 8%. Some sites quote a margin of just over one week. This means, that if the bleeding was truly a period and not implantation bleeding, that the ultrasound may be slightly inaccurate. I hope this helps, feel free to ask any other questions