First trimester

1 Months Pregnant

A look at weeks 1 through 4

Month 1 (weeks 1–4) spans the last menstrual period through implantation. Most people are not yet aware of the pregnancy. Folic acid and lifestyle review matter most now.

Key changes this month

  • Weeks 1–2 are technically pre-pregnancy: the body prepares to ovulate.
  • Most people do not yet know they are pregnant. Some notice light implantation spotting.
  • No formal prenatal visit yet. Schedule one once a test is positive.

Weeks in this month

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Textbook averages. Individual variation is wide and this is not medical advice — confirm with your OB.