8 Early Signs of Pregnancy: What to Look For

Identifying pregnancy in its earliest stages can be challenging, as symptoms often mimic premenstrual signs or other health issues. However, knowing what to watch for can be helpful for those who are actively trying to conceive. Even for those using contraception, recognizing early signs of pregnancy on birth control is important, as no method is 100% effective. Here, we outline 8 early signs of pregnancy to look for, along with insights on when symptoms may begin and how to differentiate them from other conditions.

1. Fatigue and Unusual Tiredness

Feeling unusually tired can be one of the earliest signs of pregnancy. Rising progesterone levels play a crucial role in supporting a developing pregnancy but can also cause an increase in sleepiness and fatigue. This symptom can start as early as one to two weeks after conception and may continue throughout the first trimester as the body adapts to new demands [1]. Incorporating fertility supplement with nutrients like folate, zinc, and vitamin B6 into your routine can help regulate hormone levels and support your body during early pregnancy, making it better equipped to manage common symptoms like fatigue and nausea.

2. Nausea and Morning Sickness

Nausea, often referred to as morning sickness, can occur at any time of day. It usually begins around the sixth week of pregnancy, though some women experience it sooner. This symptom varies significantly in severity; for some, it might be mild queasiness, while others may experience more intense nausea. Hormonal changes, particularly increased levels of hCG (human chorionic gonadotropin), are thought to trigger this symptom [2].

3. Breast Tenderness and Sensitivity

In the early stages of pregnancy, hormonal shifts can cause breasts to become tender, swollen, or sensitive to the touch. This symptom is common and often noticed within the first few weeks after conception. The sensation may resemble premenstrual breast tenderness but tends to last longer and be more pronounced during pregnancy. Increased blood flow to the breast tissue can also lead to darkening of the areolas [3].

4. Frequent Urination

The need to urinate more frequently is another early sign of pregnancy that can start within the first few weeks. Increased blood flow to the kidneys and pelvic region, driven by hormonal changes, is responsible for this symptom. As pregnancy progresses, the expanding uterus places additional pressure on the bladder, which can further contribute to this frequent need [4].

5. Mood Swings and Emotional Sensitivity

Mood swings are commonly associated with pregnancy due to the rapid hormonal changes taking place in the body. These fluctuations can lead to increased emotional sensitivity, irritability, or moments of sadness or joy without a clear cause. This symptom may arise as early as a few weeks after conception and can vary throughout pregnancy.

6. Light Spotting or Implantation Bleeding

Many women report light spotting or bleeding around the time of implantation, which occurs when the fertilized egg attaches to the uterine wall, typically around 6 to 12 days after conception. This bleeding is usually much lighter than a period and may appear as pink or brown spotting. While it doesn’t happen in every pregnancy, it can be one of the earliest signs for those who experience it [5].

7. Sensitivity to Smells and Food Aversions

Heightened sensitivity to smells, known as hyperosmia, is another common early pregnancy symptom. Many women find they develop aversions to certain foods or scents they once enjoyed, which can trigger nausea or discomfort. This can be especially noticeable around the fifth or sixth week of pregnancy, though it may begin earlier in some cases. This symptom is believed to be an evolutionary response to protect the developing baby from potential toxins.

8. Changes in Basal Body Temperature

For those tracking basal body temperature (BBT) for conception purposes, an early indicator of pregnancy can be an elevated temperature that remains high for more than two weeks. After ovulation, BBT typically rises due to increased progesterone levels, which are sustained if pregnancy occurs. Consistently elevated temperatures beyond the usual luteal phase can be an early clue [6].

When Do Pregnancy Symptoms Typically Start?

For those wondering what week do pregnancy symptoms start?, it’s essential to know that signs can appear as early as one week after conception. However, it’s more common to experience noticeable symptoms around the fourth to sixth week, which coincides with the time of a missed period. Every pregnancy is unique, so symptom timing and intensity can vary widely. Some women may experience all these symptoms, while others might only notice a few.

How to Differentiate Early Pregnancy Symptoms from PMS

Many of these symptoms, such as fatigue, mood swings, and breast tenderness, can resemble premenstrual syndrome (PMS). However, pregnancy symptoms are often more persistent and may intensify as hormone levels rise. For those experiencing these symptoms and suspecting pregnancy, a home pregnancy test can provide confirmation as early as 10 to 14 days after conception. Testing with the first morning urine can improve accuracy by capturing higher levels of hCG.

Taking the Next Steps

If any of these 8 early signs of pregnancy are present, and there’s a possibility of conception, taking a pregnancy test is the next step. Early detection allows for timely prenatal care, which supports a healthy pregnancy journey. For those actively trying to conceive, tracking symptoms alongside methods like basal body temperature and ovulation calendars can increase awareness of early signs and improve the chances of timely confirmation.

Research

1. NHS UK. Tiredness and sleep problems in pregnancy. [Accessed: 02/Nov/2024]. https://www.nhs.uk/pregnancy/related-conditions/common-symptoms/tiredness/ 
2. Mother To Baby | Fact Sheets [Internet]. Brentwood (TN): Organization of Teratology Information Specialists (OTIS); 1994-. Nausea and Vomiting in Pregnancy (NVP) 2024 Feb. Available from: https://www.ncbi.nlm.nih.gov/books/NBK582541/ 
3. MedicalNewsToday. Breast pain and pregnancy: Diagnosis and treatments. [Accessed: 02/Nov/2024]. Available from: https://www.medicalnewstoday.com/articles/breast-pain-and-pregnancy 
4. Beyazıt A, Hakverdi AU, Gözükara KH. The Effect of Pregnancy on Urinary Symptoms. Cureus. 2023 Aug 28;15(8):e44232. doi:10.7759/cureus.44232. PMID: 37772213; PMCID: PMC10523107.
5. E.W. Harville, A.J. Wilcox, D.D. Baird, C.R. Weinberg, Vaginal bleeding in very early pregnancy, Human Reproduction, Volume 18, Issue 9, September 2003, Pages 1944–1947, https://doi.org/10.1093/humrep/deg379 
6. Steward K, Raja A. Physiology, Ovulation And Basal Body Temperature. [Updated 2023 Jul 17]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK546686/