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Doctor insights on: Ultrasound Of 12 Weeks Of Pregnancy

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When 1st trimester ultrasounds date pregnancy how do they base the gestational age? Do they assume conception occured on cd14?

When 1st trimester ultrasounds date pregnancy how do they base the gestational age? Do they assume conception occured on cd14?

US: First trimester ultrasound is based on biometric measurements only, the embryonic crown-rump length, which is extremely reliable when done by a skilled sonographer. No assumptiosn need be made at all. The ega is however reported correctly, by convention, from the first day of a hypotehtical last menstrual period; so in that regard it 'assumes' conception on cd 14. ...Read more

Dr. Michael Gabor
2,193 doctors shared insights

Sonogram (Definition)

An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more


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With a normal pregnancy, all ultrasounds including ones in the 1st trimester showed LMP 10/15/12. Could conception have occurred after 11/7/12?

With a normal pregnancy, all ultrasounds including ones in the 1st trimester showed LMP 10/15/12. Could conception have occurred after 11/7/12?

Pregnancy sono: If the ultrasounds were done in the first trimester and all confirm the 10/15/12 lmp, then there is little chance that conception occurred after 11/7/12. The first trimester ultrasound is usually sensitive to +/- 3 days. ...Read more

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If pregnancy is dated by ultrasound and dated the baby by crl at 12 weeks, do I go back 10 weeks from the scan date to figure out conception?

If pregnancy is dated by ultrasound and dated the baby by crl at 12 weeks, do I go back 10 weeks from the scan date to figure out conception?

Conception: Please go look at the many conception calculators online. These free tools on the web will answer so many of your questions and possibly provide entertainment as well. I use this one: http://www.Babymed.Com/pregnancy-due-date-calculator. ...Read more

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Is a transabdominal ultrasound at presumably 12 weeks 100% accurate to confirm no pregnancy?

Is a transabdominal ultrasound at presumably 12 weeks 100% accurate to confirm no pregnancy?

12 weeks or no pregn: Yes. The sonogram at 12 weeks wouled be able to at least verify presence or absence of pregnancy. Is that what you are asking? ...Read more

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Is it possible for ultrasound in pregnancy to give inaccurate dates? I think if further along by 3 wks, 1st trimester

Is it possible for ultrasound in pregnancy to give inaccurate dates? I think if further along by 3 wks, 1st trimester

Not 1st trimester: A professionally done first trimester ultrasound is accurate to +/- around 3 days, so there is no way to 'mistake' dates by 3 weeks. Ultrasound by a non-qualified individual could be off by this amount I suppose, otherwise they are extremely accurate. ...Read more

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Will a pelvic ultrasound of the uterus and ovaries detect a pregnancy at 12 weeks?

Will a pelvic ultrasound of the uterus and ovaries detect a pregnancy at 12 weeks?

Yes: A pregnancy will certainly be detected by ultrasound at 12 weeks. The heartbeat should also be present! ...Read more

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Will my baby survive if my wife gave birth after 12 weeks of pregnancy? My wife has been stressed and gave birth after 12 week weeks of pregnancy can my baby survive?

Will my baby survive if my wife gave birth after 12 weeks of pregnancy? My wife has been stressed and gave birth after 12 week weeks of pregnancy can my baby survive?

Fake question,right?: If your wife had delivered at 12 wks you would already know the outcome.They all die within hours if they have a heartbeat at this gestation.If she delivered in a hospital capable of high level neonatal care, she would need to make it to 22-23 weeks for any possibility of survival and even then, less than 10% make it. ...Read more

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Can you have beef jerky in first 12 weeks of pregnancy?

Can you have beef jerky in first 12 weeks of pregnancy?

Yes, but : It's not the healthiest of foods, so please make sure to eat a balanced diet as well. ...Read more

Dr. Darrin Cunningham
4 doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more