Symptoms of pregnancy: What happens right away

The earliest symptoms of pregnancy can appear in the first few weeks after conception. Here's what you might experience, from nausea and tender breasts to dizziness and mood swings. By Mayo Clinic Staff

Could you be pregnant? The proof is in the pregnancy test. But even before you miss a period, you might suspect — or hope — that you're pregnant. For some women, early signs and symptoms of pregnancy begin in the first few weeks after conception. Know the first signs of pregnancy.

Classic symptoms of pregnancy

In addition to a missed period, the earliest signs and symptoms of pregnancy might include:

  • Tender, swollen breasts. Early in pregnancy hormonal changes might make your breasts tender, sensitive or sore. Or your breasts might feel fuller and heavier.
  • Nausea with or without vomiting. Morning sickness, which can strike at any time of the day or night, sometimes begins as early as three weeks after conception. While the cause of nausea during pregnancy isn't clear, pregnancy hormones likely play a role. Pregnant women might also find that smells that never bothered them before now cause nausea.
  • Increased urination. You might find yourself urinating more often than usual.
  • Fatigue. Fatigue also ranks high among early symptoms of pregnancy. During early pregnancy, levels of the hormone progesterone soar — which can make you feel sleepy.
  • Food aversions or cravings. When you're pregnant, you might find yourself turning up your nose at certain foods. Food cravings are common, too. Like most other symptoms of pregnancy, these food preferences can be chalked up to hormonal changes.
Jul. 12, 2013 See more In-depth