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If 1st trimester u/s are off by a week, than would this mean fetus gest age would be off? Would fetus be 11 or 13 weeks then when it measured 62mm?
Do all fetuses in 1st trimester measure the same or can there be wide variation? A12 wk fetus couldn't measure 8-9 wks;too wide a difference in mm?
Do fetuses in the 1st trimester measure the same or can there be a wide variation in mm?
Do all fetuses grow the same in the first trimester? Poss for a fetus to grow small & date multiple weeks behind? Ex actually be 12w, but date 8w?
Is it possible for a fetus to be slower growing in the first trimester & just be small for ga, causing measurements to be off?
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