The integral optical detection and microprocessor enable. This study has high lighted that when ma king accurate. This was because the rate of withdrawal. Consequently, the embryo is about 2 weeks younger than the number of weeks traditionally assigned to the pregnancy. The doctor calculates the approximate date of delivery by counting back 3 calendar months from the first day of the last menstrual period and adding 1 year and 7 days.
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Your pregnancy and baby guide
The potential sources of random error were those of operator judgement, movement of the fetus and mother, machine sensitivity settings and measurement from the photograph; while the sources of systematic error were those of oscilloscope scale factor, and velocity calibration inaccuracies, and the effect of beam width. Detection of early pregnancy forms of. Delivery Was This Page Helpful? Black or African American Study News Health Tip: