Ultrasounds dating from lmp conception

Hey guys so I’m wondering if anyone has any onsite on this.My LMP started February 28th which gives me a due date of Dec 5th, but when I originally found out o was pregnant I had lost the calendar I wrote that on so the OB did an ultrasound and gave me the due date of Dec 17th. but everyone in my family has been over 10lbs my niece was almost 12lbs sooo either way I’m guessing I’m having a big baby My LMP puts me at 12/10/18 but my first Ultrasound put my due date at 12/18/18 and my second ultrasound matched up my LMP.However, the timing of the actual delivery is not so predictable.Some women will deliver on their due date, others before, and others after.This method continues in the subsequent trimesters.In the second trimester, the determination also defaults to the LMP unless the ultrasound estimate is more than two weeks different from the LMP.Trimesters, however, have a variability of a few weeks, so they should be thought of as general benchmarks.

It is also important to note that the phrase “late-term,” popularly used by the media to describe later abortions, has no medical meaning and is not used in any medical documentation.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.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. According to LMP of June 5, I would be due March 12.

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