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Doctor insights on: Ultrasound At 13 Weeks Pregnant

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Dr. Michael Gabor
2,271 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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If ultrasound shows us beby girl gender in 13 weeks pregnancy, is that possible gender can change in 20 weeks pregnancy? Dr says depends on anatomy.

If ultrasound shows us beby girl gender in 13 weeks pregnancy, is that possible gender can change in 20 weeks pregnancy? Dr says depends on anatomy.

Gender determined: A baby does not change gender. If the baby is a girl it is a girl. If it is a boy it is boy. 13 weeks is early to determine the gender via sonogram. Most likely your doctor will recommend repeating the sonogram when the pregnancy is further along ...Read more

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Hi If ultrasound shows us beby girl gender in 13 weeks pregnancy, is that possible gender can change in 20 weeks pregnancy? Dr says depend on anatomy

Hi If ultrasound shows us beby girl gender in 13 weeks pregnancy, is that possible gender can change in 20 weeks pregnancy? Dr says depend on anatomy

Gender won't change: The earlier it is in a pregnancy, the harder it is to determine. Since the gender is determined at conception (I think), it won't change. So, it's more like the radiologist/tech wasn't sure earlier, and became more sure later on. ...Read more

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How accurate is a transabdominal ultrasound done at 13 weeks pregnancy? Due date given was june 16th 2013 so when did I conceive?

How accurate is a transabdominal ultrasound done at 13 weeks pregnancy? Due date given was june 16th 2013 so when did I conceive?

11 weeks before: If the scan said you were 13 weeks that day, then 11 weeks before that day in general would be time of conception. ...Read more

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Does a pelvic ultrasound have to be transvaginal to show a 13 weeks pregnancy? Or can it be a normal pelvic ultrasound

Does a pelvic ultrasound have to be transvaginal to show a 13 weeks pregnancy? Or can it be a normal pelvic ultrasound

Depends: If your uterus is tilted backwards and your doctor wishes to do a detailed anatomy look specially at the nuchal translucency area, than a transvaginal ultrasound will give more details. If it is just to check heart beat or placenta or just of remeasuring growth than a normal pelvic ultrasound should suffice. Discuss with your doctor. Good Luck and have an easy pregnancy and childbirth. ...Read more

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How accurate is a dating scan performed at 13 weeks pregnancy?

How accurate is a dating scan performed at 13 weeks pregnancy?

Should be ok: Dating ultrasound scans have good accuracy at 8-11 weeks, so one done at 13 weeks should still be reliable. Dates by ultrasound are always estimates. ...Read more

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Can a dating scan done at 13 weeks pregnancy be wrong by 2 weeks?

Can a dating scan done at 13 weeks pregnancy be wrong by 2 weeks?

Yes: The older the fetus, the larger the margin of error. The estimate is based on multiple factors, and is an average of indicators. This is probably a range of dates, and not really a concrete date. You really need to see all the indices. At 13 weeks, the crown-rump length can be off this much and still be within 2 standard deviations. ...Read more

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Is it safe to take Adco_Napamol during 13 weeks pregnancy?

Is it safe to take Adco_Napamol during 13 weeks pregnancy?

Yes: Yes, the active ingredient is paracetamol or acetaminophen (Tylenol here in the US). You just need to follow the directions on the bottle/package. It is safe for the entirety of the pregnancy. ...Read more

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Can stress conflict and confrontation with someone affect my 13 weeks pregnancy?

Can stress conflict and confrontation with someone affect my 13 weeks pregnancy?

Of course.: Pregnancy is a stressful time on you mentally and physically. There are a lot of hormonal changes. Additional stress and confrontation should be avoided as this may lead to unwanted side effects during pregnancy. If you are scared or frightened you or your baby may be injured, you should seek help and shelter immediately with family, friends. Or local protection shelter for women. Best of luck ...Read more

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19weeks pregnant. Been bleeding bright red to brown off and on since 13 weeks. Ultrasounds ay baby is good. Why am I having this problem?

19weeks pregnant. Been bleeding bright red to brown off and on since 13 weeks. Ultrasounds ay baby is good. Why am I having this problem?

Hard to know: You may be having a chronic separation of the placenta that seals over, bleeds, re-seals and so on. Perhaps it is from your cervix. There can be other causes. Keep in close contact with your ob. If continues, maybe you need consultation with a high risk pregnancy doctor if available. ...Read more

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I'm 13 weeks and 1 day pregnant and I had a ultra sound yesterday and got told I have a medium size hemorrhage and I'm 21 yrs old what are the chances?

I'm 13 weeks and 1 day pregnant and I had a ultra sound yesterday and got told I have a medium size hemorrhage and I'm 21 yrs old what are the chances?

1/6 risk miscarriage: 1/3. Bleed in pregnancy, 1/3 of those miscarry, 1/3. Continue bleeding and have a normal baby, 1/3 stop bleeding and have normal baby. There are no proven maneuvers to prevent. Early miscarriage but it makes sense to take it easy, no straining or sex until the bleeding stops and any clots have passed out as seen on ultrasound. Idea. To keep the uterus undisturbed to allow healing. ...Read more

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I m 13 weeks pregnant. Every month altrasound is ok for my baby? I had urine test. My urine report is. Protein n glucose is nil wbcs/hpf 2-4hpf ok?

I m 13 weeks pregnant. Every month altrasound is ok for my baby? I had urine test. My urine report is. Protein n glucose is nil wbcs/hpf 2-4hpf ok?

Healthy pregnancy: There's nothing harmful about the scenario you describe though I do not know why you're getting ultrasounds so frequently. If you have not gotten a urine culture in pregnancy yet, you should. ...Read more

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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

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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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Is an ultrasound at 13 weeks measuring crl accurate?

Is an ultrasound at 13 weeks measuring crl accurate?

Maybe: This is in the area of overlap where crl loses accuracy and measuring fetal parts like head diameter is also not as accurate, which is why we like to do sono before 12 or after 14. ...Read more

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Could an ultrasound at 13 weeks be wrong & you could actually be 17 weeks?

Could an ultrasound at 13 weeks be wrong & you could actually be 17 weeks?

No: There variability in the ultrasound measurement results would be about one week. If the baby is growing normally the ultrasound estimate would not be off/ incorrect by 4 weeks. ...Read more

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Can a transabdominal ultrasound at 13 weeks be wrong by 2 weeks?

Can a transabdominal ultrasound at 13 weeks be wrong by 2 weeks?

Not likely: Ultrasound dating is quite accurate in the earlier part of pregnancy. While it may be off by 2-3 days it would be highly unlikely to be "wrong" by 2 weeks. Keep in mind that the ultrasound age indicates the number of weeks since the first day of the last menstrual period, not the date of conception. This may explain a two week difference if you arethinking about date of conception. ...Read more

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On december 10th 2012 I was dated 13 weeks and 1 day pregnant by ultrasound! So when did I conceive?

On december 10th 2012 I was dated 13 weeks and 1 day pregnant by ultrasound! So when did I conceive?

Sept 23: By the dates you gave here your due date should be around june 16 and your date of conception about september 23, 2012. ...Read more

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Can first trimester dating ultrasounds be a month off gestational age? (if taken at 8 weeks) could I have been 13 weeks and they measured 8?

Can first trimester dating ultrasounds be a month off gestational age? (if taken at 8 weeks) could I have been 13 weeks and they measured 8?

Unlikely: Ultrasound dating is very accurate when done around 8-11 weeks of gestation. But, as always, life is not perfect and mistakes can happen. A woman should be able remember what she was doing 6 weeks ago (around the time of conception) if the u/s scan is showing 8 weeks gestation. ...Read more

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Hi, I am 13 weeks pregnant and last went for ultrasound scan when I was 8 weeks. How often should an ultrasound be done or when should I go to next?

Hi, I am 13 weeks pregnant and last went for ultrasound scan when I was 8 weeks. How often should an ultrasound be done or when should I go to next?

Well: If you have a normal pregnacy and everything develops properly and you have no risks factors it is not necessary to do any ultra sound. How er you could be a high risk pregnancy and then multiple us are recommended ...Read more

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How accurate is gestational age at 13 weeks via ultrasound?

About 7 days: First trimester ultrasounds are the most accurate, but a 13 week ultrasound should be quite good at estimating the due date. Best of luck! ...Read more

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How many ultrasounds will be done during my visits to the doctor? I'm 13 weeks.

How many ultrasounds will be done during my visits to the doctor? I'm 13 weeks.

Pregnancy Monitoring: Ultrasounds have become a powerful tool in watching a healthy pregnancy and also in diagnosing pregnancy complications. There are often two or three of these during the pregnancy. If more are recommended you obstetrician will know why and be able to explain to you what this is about. ...Read more

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My DD is according to 1st trimester is 13 nov latest ultrasound suggests edd 31 October. I don't know my LMP. Kindly suggest does delivery can b early?

My DD is according to 1st trimester is 13 nov latest ultrasound suggests edd 31 October. I don't know my LMP. Kindly suggest does delivery can b early?

Delivery date: Your due date is a marker for when you turn 40 weeks. This is not the same as the day that you will deliver. Normal delivery occurs between 37-42 weeks. A first trimester sonogram is very accurate for due date calculations. The due date is not changed by a 3rd trimester sonogram. ...Read more

Dr. Sheila Smith
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


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