Get your Health question answered in 3 easy steps
A Doctor will be with you shortly
Ask a Doctor Now
120 Doctors are Online

Pregnant. Ultrasound did not detect pregnancy. Found a dominant follicle in ovary. What does it mean?

User rating for this question
Very Good
Answered by

General & Family Physician
Practicing since : 2005
Answered : 436 Questions
Hi, I am 4 weeks pregnant, I went to the doctor yesterday and they did an ultrasound, they could not see anything. Only note that they made is that I have a dominant follicle in right ovary. What does this mean? They did a blood test and the blood test came back that I am pregnant. Is it possible not to see anything at 4 weeks?
Posted Fri, 27 Apr 2012 in Pregnancy
Answered by Dr. Radhika 37 minutes later
Thanks for posting your query.
Yes, a trans-abdominal ultrasound cannot reliably diagnose pregnancies that are less than 6 weeks gestation. However, a transvaginal ultrasound, can detect pregnancies earlier, at approximately 4 ½ to 5 weeks gestation.
The absence of a gestational sac at 4 weeks of pregnancy can be suggestive of two things:
a.     The sensitivity of a transabdominal scan is low, so we can wait for another 2 weeks to repeat a scan and see if a gestational sac appears. Alternatively, you can get a transvaginal scan done in a week’s time.
b.     If the gestational sac does not appear in another 2 weeks, an ectopic pregnancy needs to be ruled out. An ectopic pregnancy is a condition where the gestational sac (which ultimately gives rise to the whole baby) gets implanted outside the uterus, most commonly in the fallopian tubes.

The gestational sac first appears at about 4 week’s gestational age in a trans-vaginal scan, and grows at a rate of about 1 mm a day through the 9th week of pregnancy. A gestational sac is sometimes seen as early as during the 4th week of gestation in Trans -vaginal scanning, it may not be seen until the end of the 5th week.
A dominant follicle is a follicle which releases an ovum, or egg, in an event called ovulation. After ovulation, the remains of the dominant follicle in the ovary become a corpus luteum cyst; this cyst produces progesterone to maintain a pregnancy.
A dominant follicle that is currently been seen on an ultrasound can be either a corpus luteum cyst (the exact differentiation between these structures can be done only on a Doppler) or an ectopic pregnancy.
I would suggest that the scan be repeated in another 2 weeks so that we can know the exact condition and further management can be planned accordingly.
Hope I have answered your query. I will be available for follow up queries. Please accept my answer in case you have no follow up queries.

Wish you good health and speedy recovery.

Above answer was peer-reviewed by
Share on Facebook
Share on Twitter
Share on Google+
Question is related to
Medical Topics

The user accepted the expert's answer

Ask an OBGYN

© Ebix, Inc. All Rights Reserved.
All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. You should always speak with your doctor before you follow anything that you read on this website. Any health question asked on this site will be visible to the people who browse this site. Hence, the user assumes the responsibility not to divulge any personally identifiable information in the question. Use of this site is subject to our Terms & Conditions
Already Rated.
Your rating:

Ask a Doctor