U.S. doctors online nowAsk doctors free
CA
A 29-year-old female asked:

will an ultrasound know the difference between implantation bleeding and a period or would that cause my due date and date of conception to be wrong?

2 doctor answers2 doctors weighed in
Dr. Jane Van Dis
Obstetrics and Gynecology 18 years experience
No: Both implantation and pre-menstrual status are going to look like 'thickened endometrium' on an ultrasound. You'll need a little more time to determine via ultrasound if you're pregnant or if you are going to have a period.
Dr. Timothy Brown
Obstetrics and Gynecology 44 years experience
Confuses the dates: An ultrasound will measure the size of the pregnancy which will tell you how to interpret the bleeding. If it was "implantation" bleeding the pregnancy will be farther along than if it was a period. You will adjust the due date and date of conception accordingly.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
$30 per visit with
membership

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
$30 per visit with
membership
Last updated Mar 27, 2015

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.