Pregnancy Chances: Signs and Symptoms to Watch For - Obstetrics and Gynecology

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Probability of Pregnancy


Hello, Doctor.
I got married at the end of last year, and since September of this year, I have not been using contraception.
My last menstrual period was from August 22 to August 28, and I have not had a period since then.
I had unprotected intercourse on September 15, September 25, and September 30.
My menstrual cycle is usually expected around September 23, but it has not arrived.
During this time, I have experienced persistent dull pain in my lower abdomen, and occasionally my lower back feels particularly sore.
Normally, I would have a headache the day before my period, but I have not experienced any of these symptoms this time.
I have been taking pregnancy tests regularly, but they all show only one line.
Could you please advise me if I might be pregnant? Thank you.

Eva, 20~29 year old female. Ask Date: 2018/10/09

Dr. Lin Manying reply Obstetrics and Gynecology


Hello Ms.
EVA: If your period is delayed by a week and the pregnancy test is negative, it is recommended to visit a gynecologist for an examination or to consider inducing menstruation.
Sometimes the desire to conceive can create underlying stress, leading to irregular periods (temporary anovulation), which may result in less noticeable premenstrual syndrome symptoms (such as headaches, abdominal bloating, etc.).
The Hualien Hospital of the Ministry of Health and Welfare cares about your health.

Reply Date: 2018/10/09

More Info


Based on the information you've provided, it seems that you are experiencing a delay in your menstrual cycle, which can be concerning, especially if you have been trying to conceive. Let's break down your situation and discuss the signs and symptoms of pregnancy, as well as what you might consider doing next.

Firstly, a missed period is one of the most common early signs of pregnancy. Since your last menstrual period was from August 22 to August 28, and you expected your next period around September 23, the absence of menstruation could suggest that you might be pregnant. However, it's important to note that there are several factors that can cause a missed period, including stress, hormonal imbalances, changes in weight, or medical conditions such as polycystic ovary syndrome (PCOS).

You mentioned experiencing lower abdominal discomfort and occasional back pain. These symptoms can also be associated with early pregnancy, but they are not definitive indicators. Many women report similar sensations during their menstrual cycle or due to ovulation. The absence of your usual premenstrual symptoms, such as headaches, could indicate a change in your hormonal levels, which might be related to pregnancy or other factors.

Regarding your pregnancy tests, it's crucial to understand that home pregnancy tests are generally reliable but can sometimes yield false negatives, especially if taken too early. The hormone human chorionic gonadotropin (hCG) is what these tests detect, and it typically becomes detectable in urine about a week after a missed period. If you tested before this time or if your levels of hCG are still low, it could result in a negative test even if you are pregnant.

Given that you have had unprotected intercourse on multiple occasions, the possibility of pregnancy is certainly there. However, if you continue to receive negative results on your home pregnancy tests, it may be wise to consult with a healthcare provider. They can perform a more sensitive blood test to measure hCG levels, which can confirm or rule out pregnancy more accurately than home tests.

Additionally, if you are experiencing significant discomfort or if your symptoms worsen, it is important to seek medical attention. Conditions such as ectopic pregnancy or ovarian cysts can cause similar symptoms and require prompt evaluation.

In summary, while the signs you are experiencing could suggest pregnancy, they are not definitive. The best course of action would be to wait a few days and retest, or to visit a healthcare provider for further evaluation. They can provide you with the necessary tests and guidance based on your individual circumstances. Remember, it's always better to consult with a professional if you have concerns about your health or potential pregnancy.

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