Page 13 - SONO 260 THE FIRST TRIMESTER
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                                                                       ž Typically, a 5-mm gestational sac will be seen at approximately 5 menstrual weeks.
ž Normal hCG levels double every 48 in the first trimester.
¡ High and low levels of hCG compared with LMP and sonographic findings can be indicative of an abnormal pregnancy.
ž The human chorionic gonadotropin level will continue to rise until the end of the first trimester, at which time it plateaus and slowly decreases with advancing gestation.
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