Endometrial Thickness Three Weeks Post-Intimacy

Endometrial thickness three weeks after sexual intercourse?

Hello doctor, I only had friction with my boyfriend on that day and did not engage in direct sexual intercourse.
Three weeks later, when I had an ultrasound, the thickness of my endometrium was 0.9 cm.
Is this normal and does it indicate that I am not pregnant?

Lala, 10~19 year old female. Ask Date: 2016/04/25

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, a pregnancy test should be taken at least 12 days after conception for accurate results.
It is advisable to use preventive measures beforehand.
If your period is more than a week late, it is recommended to see a gynecologist.
Wishing you good health.

Reply Date: 2016/04/25

More Info

Understanding the thickness of the endometrial lining is crucial for assessing reproductive health, particularly in the context of potential pregnancy or menstrual cycle phases. In your case, you mentioned that you engaged in intimate contact with your boyfriend, which did not involve penetrative intercourse, and subsequently had an ultrasound three weeks later that revealed an endometrial thickness of 0.9 cm (or 9 mm).
To address your primary concern: a 9 mm endometrial thickness can be considered within the normal range for the luteal phase of the menstrual cycle, which occurs after ovulation and before menstruation. During this phase, the endometrium thickens in preparation for a potential implantation of a fertilized egg. If pregnancy does not occur, the lining is shed during menstruation.
In terms of pregnancy, the endometrial lining typically thickens significantly after ovulation, and if implantation occurs, it can remain thickened. A thickness of 9 mm is generally not indicative of pregnancy; however, it is not definitive either. The absence of menstruation, along with other symptoms such as nausea or breast tenderness, would be more suggestive of pregnancy.
It is also important to note that the endometrial thickness can vary based on several factors, including hormonal levels, the phase of the menstrual cycle, and individual variations. For instance, in premenopausal women, the endometrial lining can range from 2 mm (during menstruation) to over 16 mm (during the secretory phase).
If you are concerned about the possibility of pregnancy despite the ultrasound results, it may be advisable to take a home pregnancy test or consult with a healthcare provider for further evaluation. They may recommend a blood test for more accurate results, as blood tests can detect pregnancy earlier than urine tests.

In summary, a 9 mm endometrial thickness three weeks after intimate contact without penetrative intercourse is generally considered normal and does not strongly indicate pregnancy. However, if you have missed your period or have any other concerns, it is always best to follow up with your healthcare provider for personalized advice and further testing if necessary. They can provide a more comprehensive assessment based on your overall health and menstrual history.

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