Dating a pregnancy
The average time between menstrual periods is about 28 days, and ovulation occurs about 14 days before the next period begins.So when we say a woman’s estimated gestational age is six weeks’ LMP, we mean she conceived about four weeks ago, around the time of ovulation.Whether you are excited or not sure how you feel about a new brother or sister, here are some ways to help manage this busy time. This website is using a security service to protect itself from online attacks.The service requires full cookie support in order to view the website.Please enable cookies on your browser and try again.
But a physical exam can be misleading (due to factors such as twins, uterine tumors, or obesity) and is not used as the main way to date a pregnancy if LMP or ultrasound is available.Handling Your Emotions Getting through the First Trimester Adapting in the Second Trimester Getting Ready in the Third Trimester Adjusting to the New Baby Show 2 more... Article Summary Questions & Answers Related Articles This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness.Together, they cited information from 13 references. Health-care providers define the stage or length of pregnancy differently than many people might think. Logically, one might imagine we represent a pregnancy by how much time has elapsed since conception.Instead, we most commonly date pregnancies from the first day of the last menstrual period (LMP).