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From early on in pregnancy, babies grow at different rates, so these numbers are merely averages. Your baby's actual length and weight may vary substantially. Don't worry too much if an ultrasound ...
www.babycenter.com/average-fetal-length-weight-chart
Upside: Detailed chart on average fetal length and weights by week
Downside: Busy page
First trimester scanning is useful to identify abnormalities in the early development of a pregnancy, including miscarriage and ectopic pregnancy, and provides the most accurate dating of a ...
www.brooksidepress.org/Products/Military_OBGYN/Ultrasound/1st_trimester_ultrasound_scannin.htm
Upside: Excellent information on what to expect from first trimester scanning including various complications
Downside: Scroll down to see the content
pregnancy? I had a crl measurement of 18mm which is 8 weeks. How accurate is this measurement in dating pregnancy? Give or take +/- in days, can it be off by? doing an u/s in the first trimester is ...
answers.yahoo.com/question/index?qid=20081017130207AAWgRrX
Upside: Answers to user generated question on crown-rump length accuracy
Downside: Range of various answers
* A Gestational sac at 5 and a half weeks (vaginal scan). Fetal poles can not yet be seen * A fetus at 6 weeks (vaginal scan) * A fetus at 7 weeks with cord and yolk sac ( vaginal scan ) * A fetus at ...
www.ob-ultrasound.net/frames.htm
Upside: Many ultrasound pictures and videos
Downside: Basic site design
Here's the stats. Last date of my wifes cycle was Sept. 4 2007 (we tried 9/16-9/22), hpt tests positive 10/6. She had a checkup with blood/urine samples last week, and today we had our '8 week' apt. ...
forums.obgyn.net/womens-health/WHF.0711/0145.html
Upside: User postings on seeing two gestational sacs
Downside: Not obvious need to click on 'Reply' to see answer; many ads
An ultrasound exam is a procedure that uses high-frequency sound waves to scan a woman's abdomen and pelvic cavity, creating a picture (sonogram) of the baby and placenta. Although the terms ...
www.americanpregnancy.org/prenataltesting/ultrasound.html
Upside: Very good overview of different types of ultrasounds and answers common questions about them
Downside: Limited links for additional depth
When are scans usually carried out? Can the scan show the gender of my baby?
www.baby2see.com/medical/ultrasound.html
Upside: Very good information on ultrasounds including when to have one and learning the gender of your baby
Downside: None
I had an early ultrasound at 10w5d. The u/s said I was 10w3d. Now to me that is very accurate. I was high risk and was measured quite often by numerous doctors and u/s techs and my due date was never ...
answers.yahoo.com/question/index?qid=20071227165553AAG7KMg
Upside: Answers to user generated question on how accurate an ultrasound is
Downside: Range of various answers
Birth Stories@ Pregnancy Video Gallery@ Pregnancy Week by Week@ Ultrasound@
pregnancyandbaby.com/read/Pregnancy_Ultrasound_Gallery/
Upside: Ultrasound images from various stages of pregnancy
Downside: Requires several clicks to get to images
This factsheet is for women who are having an ultrasound scan during pregnancy. Ultrasound is used to monitor your baby's development and check for physical abnormalities.
hcd2.bupa.co.uk/fact_sheets/html/ultrasound.html
Upside: Information on ultrasound procedure and its safety
Downside: None