Pregnancy Chances: Key Insights for Women’s Health

Pregnancy probability

On January 19, my boyfriend inserted his finger into my vagina (I am "unsure" if there was any contact with pre-ejaculate, but he was wearing underwear and thin athletic shorts the entire time, so even if there was contact, it would have been an extremely small amount that might have seeped through the fabric).
Aside from that, we had no sexual intercourse.
Two days later, on January 21, I went to a gynecologist who performed an ultrasound and said my endometrial thickness was only 0.516 cm.
Later, on February 4, I used a pregnancy test, and both the test stick and the test plate visually showed negative results with absolutely no trace of a second line.
However, after adjusting the photo's color multiple times, it seemed that there was a faint second line (even after many adjustments, the line was so faint it was almost invisible and could only be seen when enlarged).
On the same day, I returned to the gynecologist, who said my endometrial thickness was 0.8 cm but did not mention the possibility of pregnancy.
I have mild polycystic ovary syndrome symptoms and my menstrual cycle is very irregular, making it difficult to accurately estimate my ovulation period.
I would like to ask the doctor: 1.
Given the current situation, do you think the likelihood of pregnancy is high? 2.
Regarding my endometrial thickening, do you believe it is due to pregnancy or changes in my menstrual cycle? I would like to know what the typical endometrial thickness is for most people in the early stages of pregnancy (around 10 days).
3.
Most importantly, do you think I need to take another pregnancy test? If so, when would you recommend I take it? Would it be too soon to test again in two days (18 days after the sexual activity)? If I test again and still get a negative result, can I conclude that I do not need to continue testing?

Megan, 20~29 year old female. Ask Date: 2021/02/05

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, you can take a pregnancy test again.
If there is only one line, it means you are not pregnant.
Wishing you good health.

Reply Date: 2021/02/05

More Info

Understanding pregnancy chances and the factors that influence them is crucial for women's health, especially for those who may have irregular menstrual cycles or other reproductive health concerns. Based on your situation, let's address your questions systematically.

1. Pregnancy Probability: Given the circumstances you described, the likelihood of pregnancy appears to be low. The fact that your boyfriend was wearing clothing during the encounter significantly reduces the chances of sperm transfer. Additionally, the negative results from the pregnancy test you conducted on February 4th, which showed no clear second line, further suggest that pregnancy is unlikely. However, the faint line you observed could indicate a very early pregnancy or a potential issue with the test itself, such as sensitivity or timing.

2. Endometrial Thickness: The thickness of the endometrium (the lining of the uterus) can vary throughout the menstrual cycle. A thickness of 0.516 cm (5.16 mm) is relatively thin and typically indicates the early follicular phase of the cycle. By February 4th, when your endometrial thickness was measured at 0.8 cm (8 mm), this could be a normal variation as your body prepares for ovulation or menstruation. In early pregnancy, the endometrial lining usually thickens to support a potential embryo, often measuring around 1 cm or more. However, variations exist, and individual factors such as hormonal levels and cycle regularity can influence these measurements.

3. Need for Further Testing: Given your irregular menstrual cycles and the faint line on the pregnancy test, it may be prudent to retest for pregnancy. If you choose to do so, waiting about 48 hours after your last test (around February 6th) could provide a more accurate result, as hormone levels would likely increase if you are pregnant. If the test remains negative and you continue to experience irregular cycles, it may be beneficial to consult with your healthcare provider for further evaluation. They may recommend blood tests, which can detect pregnancy earlier and more reliably than home urine tests.

4. Polycystic Ovary Syndrome (PCOS): You mentioned having mild symptoms of PCOS, which can complicate ovulation and menstrual regularity. Women with PCOS often experience irregular periods and may have difficulty predicting ovulation, which can affect their chances of conception. If you are concerned about your fertility or menstrual irregularities, discussing these issues with a healthcare provider can help you explore potential treatments or lifestyle changes that may improve your reproductive health.

5. General Recommendations: Maintaining a healthy lifestyle, including a balanced diet and regular exercise, can positively impact your reproductive health. If you are trying to conceive, tracking your menstrual cycle and ovulation signs can also be beneficial. Additionally, managing stress levels and ensuring adequate sleep can support overall hormonal balance.

In summary, while the chances of pregnancy in your situation seem low, retesting for pregnancy after a few days could provide clarity. Monitoring your menstrual cycle and consulting with a healthcare provider about your irregularities and any symptoms of PCOS can help you better understand your reproductive health and options moving forward.

Similar Q&A

Understanding Pregnancy Tests: Signs and Chances of Conception

1. If your last menstrual period was on March 4 and you have a menstrual cycle of 36 days, you would expect your next period around April 9. Engaging in sexual intercourse on March 1 with withdrawal method (pulling out) and no condom does carry a risk of pregnancy, although it is...

Dr. Zhan Deqin reply Obstetrics and Gynecology
The appearance of two lines about nine hours later is not a reliable indication. Generally, having intercourse three days before menstruation presents a low chance of pregnancy; however, there have been reports of pregnancies occurring because women can occasionally ovulate durin...

Understanding Pregnancy Chances: Key Dates and Factors to Consider

The menstrual period is from February 3 to February 8, with a cycle length of approximately 27 to 29 days. If intercourse occurred on February 11, February 19, and February 20, what is the likelihood of pregnancy?

Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, have a chance. Wishing you good health.

Understanding Your Chances of Pregnancy: Key Factors and Testing Tips

Hello doctor, I would like to ask about the chances of getting pregnant. My menstrual cycle is irregular, and the number of days in the past few months has been as follows: 33, 37, 33, and 24 days. My last menstrual period was from July 10 to July 17. I had unprotected intercours...

Dr. Huang Jianzhong reply Obstetrics and Gynecology
The menstrual cycle is irregular, with the following cycle lengths in the past few months: 33, 37, 33, and 24 days. The last menstrual period was from July 10 to July 17. Intercourse occurred on July 17, July 19, July 23, and July 25 without protection. Is there a high chance of ...

Missed Period: Understanding Pregnancy Chances After Months of No Sex

It has been several months since engaging in sexual intercourse. Menstruation occurred last month and the month before, but when the estimated period was due, it did not arrive. What is the likelihood of pregnancy in this situation?

Dr. Zhang Kunmin reply Obstetrics and Gynecology
Hello, the factors affecting the menstrual cycle are numerous, including age, environment, lifestyle, stress, emotional instability, weight changes, medications, emergency contraception, diet, polycystic ovary syndrome, uterine or cervical lesions, infections, ovulation, pregnanc...