Is ultrasound probe date of conception right on?

Patient : How accurate is ultrasound probe? i was told 4 weeeks pregnant.
Doctor :   In patients with uncertain last menstrual periods, Ultrasound evaluation to estimate the gestational age must be made as early as possible in pregnancy to arrive at a correct dating for the patient. However there is an error of +- 5-7 days, for more accurate estimation HCG levels also known as the pregnancy hormone should be measured as well. I hope I cleared your doubt.  

Related Q&A

Q: Hello, I'm worried about the length of my period. It only lasts for one day. Before I had a child 2 years ago it only...

Q: Ok, my fiancé and I are trying to have a baby, and did everything that I was supposed to do like the ovulation...

Q: Hello doctor, Recently me and my girlfriend were making love and my foreskin ripped off and I bled heavily and I'm f...

Q: Fertility after contraceptive injection I was on the contraceptive injection for 3 years had my last one in March 20...

Q: I am a 28 year old female who has regular periods. Every 34 days. I am currently trying to conceive. I have been off ...

 
DOCTOR ADVISORY BOARD
218

Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician
173

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician
138

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist
98

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon
CNN
BBC
MSNBC
CBS
abcNews
FoxNews