Understanding Pregnancy: Does Conception Count as Day 1?

Explore why conception is not considered day 1 of pregnancy and how gestational age is calculated from your last menstrual period.

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Conception does not count as day 1 of pregnancy. Pregnancy is typically calculated from the first day of your last menstrual period (LMP). This method, called gestational age, assumes a standard 28-day cycle. Thus, conception usually occurs about 2 weeks after the first day of the LMP.

FAQs & Answers

  1. How is pregnancy calculated? Pregnancy is typically calculated from the first day of your last menstrual period, not from the day of conception.
  2. What does gestational age mean? Gestational age refers to the age of the pregnancy calculated from the first day of the last menstrual period.
  3. When does conception usually occur? Conception usually occurs about two weeks after the first day of your last menstrual period in a standard 28-day cycle.
  4. Why is the first day of the last menstrual period used in pregnancy calculations? It is used as a reference point because it is usually easier to determine than the exact date of conception.

Watch More

For more insights into reproductive health and pregnancy, check out our videos on fertility tips and understanding menstrual cycles.

  1. How Long is Pregnancy After Conception? Understanding Duration Discover the typical duration of pregnancy after conception and how it correlates with the menstrual cycle.
  2. Is 5 Weeks Pregnant Actually 3? Understanding Pregnancy Calculations Learn why 5 weeks pregnant is counted as 5 weeks and how pregnancy weeks are calculated from the last menstrual period.