Dating of pregnancy blind dating watch online viooz
However, the timing of the actual delivery is not so predictable.
Some women will deliver on their due date, others before, and others after.
Instead, we most commonly date pregnancies from the first day of the last menstrual period (LMP).
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.
Because few women know the exact day they ovulated or conceived, an ultrasound done in the first trimester of pregnancy has been shown to the be the most accurate way to date a pregnancy.
If an ultrasound date in the first trimester differs from your LMP date by seven days or more, we would go with the ultrasound.
Medical professionals use a standard set of up to three methods to date pregnancies: last menstrual period, ultrasound, and a physical exam.
That way, regardless of where they trained or where they practice, any two doctors dating a pregnancy will predict the same due date or gestational age.
Human chorionic gonadotropin is a hormone produced by the placenta early in pregnancy.
For most mums-to-be, the first scan will be a dating scan at between 10 weeks and 13 weeks plus six days of pregnancy.
However, the timing of your first scan will also depend on how your pregnancy is going, and where you live.
However, if you did not get a first trimester ultrasound for dating and an ultrasound done to look at the baby's anatomy (usually at 18-20 weeks of pregnancy) differs from your LMP date by 10 to 14 days, we would change your date to the ultrasound estimate.
When people discuss how far along in pregnancy someone is, they tend to do so in general terms: “She’s in the first trimester” or “She’s four months along.” However, many people have only a vague idea of what those phrases really mean.