Pregnancy symptoms can start very early, often within one to two weeks after conception, though timing varies widely among individuals. Some women may notice symptoms as soon as a week after conception, which is about one week before a missed period, while others may start experiencing symptoms closer to four to six weeks after conception

. Early pregnancy symptoms that can appear within the first 1-2 weeks after conception include:

• Light spotting or implantation bleeding
• Fatigue
• Breast tenderness or sensitivity
• Cramping
• Bloating
• Mood swings
• Increased urination
• Changes in taste and smell sensitivity
• Mild nausea or dizziness (morning sickness typically starts between 2 and 8 weeks)

The most common and earliest noticeable sign is often a missed period, which usually occurs about two weeks after conception, when the body starts producing the pregnancy hormone hCG

. Symptoms can sometimes be confused with premenstrual symptoms, and some women may experience no symptoms during the first trimester at all

. If multiple early signs are present, it is advisable to take a pregnancy test or consult a healthcare provider for confirmation

. In summary, pregnancy symptoms can start as early as one week after conception but more commonly appear around 4 to 6 weeks into pregnancy, with a wide range of possible symptoms and variation between individuals.