Pregnancy dating by lmp Toronto horny phone chat

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).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.On average only 5% of births take place exactly on the estimated due date.Most are born within a week either side of the estimated due date.The expected duration of a pregnancy is 40 weeks from the first day of LMP (four weeks more than the traditional nine months by which many count).Medical professionals consider delivery premature when it occurs before 36 weeks, and extremely premature when it occurs before 28 weeks’ LMP.

If you know the date of the first day of your last menstrual period (LMP), or have already had your first ultrasound scan, you can use this tool.One reason for not dating pregnancies from the day of conception is that we cannot know that day exactly (excluding cases of assisted reproduction), but we can know the first day of LMP, based on what a patient reports to us.Also, when providers all use the same LMP date, we are using one system that provides a standard convention.Please remember that the result will not necessarily be the day that your baby arrives.The actual date may be any time from 38 to 42 weeks in most pregnancies.