Here is when the most common early pregnancy symptoms typically appear:

1. Missed or Delayed Period:
   - This is often one of the earliest and most reliable signs of pregnancy.
   - It can occur as soon as 1-2 weeks after conception.

2. Breast Changes:
   - Tenderness, swelling, and darkening of the areolas can begin as early as 1-2 weeks after conception. 
   - Increases in breast size generally appear a bit later, within the first 4-6 weeks.

3. Fatigue:
   - The rise in progesterone levels can cause extreme tiredness within the first few weeks of pregnancy.

4. Nausea and Vomiting: 
   - Commonly referred to as "morning sickness", this symptom typically appears between 4-9 weeks of pregnancy, though it can last all day.

5. Increased Urination:
   - This symptom can start as early as 4-6 weeks, as the growing uterus puts pressure on the bladder.

6. Food Cravings or Aversions:
   - Hormonal changes can cause food cravings or aversions from the early weeks of pregnancy.

7. Implantation Bleeding:
   - This light spotting or bleeding usually occurs 6-12 days after conception, when the fertilized egg implants into the uterine lining.

It's important to note that the timing of when these symptoms appear and their severity can vary greatly between individual women. If you suspect you may be pregnant, it's best to take a pregnancy test and consult your healthcare provider.

妊娠中にこれらの症状は通常いつ現れるのでしょうか?