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But if thin patient, experienced operator of the ultrasound and good views it can be very accurate. I would recommend discussing paternity issues with your partner in a calm and dispassionate way, realizing that ovulation does not occur the same time every cycle and that can throw her estimation of the pregnancy age or conception date off.If you are still concerned, paternity dna tests exist. Read more Most obs perform a high-resolution us between 18-20 weeks to rule out anomalies.An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body.
dating barely legal Ldquo, I was, I would say, a semester,rdquo, he says.x what i don't understand is how babies measure different CRL yet that is how they measure the EDD on the ultrasound?If one baby is measuring say 67mm and one 76mm, and they date them both at 13w, how does that work??Hi, I think with the very early scans, 5-6 weeks they can be a little bit off.Mine sas I was 5 weeks but I knew from my calculations that I was a week further on.