Lmp dating


17-Dec-2016 02:52

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A positive pregnancy test 3 weeks previously for example, would indicate a gestational age of at least 7 weeks.Such information would be useful against the interpretation of the scans. In the presence of first trimester bleeding, ultrasonography is also indispensible in the early diagnosis of ectopic pregnancies and molar pregnancies. Determination of gestational age and assessment of fetal size.

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a) The Crown-rump length (CRL) This measurement can be made between 7 to 13 weeks and gives very accurate estimation of the gestational age.If this is observed, the probability of a continued pregnancy is better than 95 percent.