Question re:pregnancy weeks

  1. Hi. I just had a question on how to count the pregnancy weeks -- I have found conflicting information. Do you count the first week from the first day of your LMP? or what? Just want to clarify this... Thanks!
    •  
  2. 2 Comments

  3. by   SmilingBluEyes
    They go by LMP. So, a person who gets a positive pregnancy test the day she is due to menstruate, provided she has a regular cycle and ovulated on or about day 14, is really considered FOUR WEEKS' PREGNANT, although by actual date of conception, only 2 weeks.

    She conceived two weeks ago, but they go to the date of LMP to calculate actual gestation period. Not to worry, anywhere from 38 weeks to 42 weeks, the greatest majority will give birth anyhow. If a person is irregular in menstrual cycles, it is harder to figure by dates her exact gestation, so often early ultrasound is relied upon to determine gestation.

    Does that make sense?
    Last edit by SmilingBluEyes on Apr 22, '04
  4. by   cinrn68
    That's what I thought... thanks for clarifying!

close