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Doctor insights on: Placenta Previa Ultrasound Third Trimester

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Dr. Michael Gabor
2,239 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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Anterior placenta previa with placental lake seen at 28w ultrasound, 2 D&Cs & no c-section hx. Any risk of placenta accreta? Best time to deliver?

Anterior placenta previa with placental lake seen at 28w ultrasound, 2 D&Cs & no c-section hx. Any risk of placenta accreta? Best time to deliver?

Placenta Previa: Placenta previa occurs when the placenta is covering the opening of the cervix. Vaginal delivery is possible in mild cases of previa. Placenta accreta is a different condition where the placenta gets "stuck" to the uterus. While the risk of accreta increases when you have previa, that risk is low if you have never had a c-section before. Follow-up with your obstetrician regarding delivery dates. ...Read more

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As my ultrasound result, it stated that im having a placenta previa totalis and myomauteri. What will i do? Is my unborn child be safe?

As my ultrasound result, it stated that im having a placenta previa totalis and myomauteri. What will i do? Is my unborn child be safe?

Yes: You willl have to be watched closely. If the placenta previa does not move your child will be born via csection. Hopefully your OB will discuss all this in detail with you. ...Read more

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Transvaginal sonogram safe if placenta previa?

Transvaginal sonogram safe if placenta previa?

Yes.: A transvaginal sonogram is typically the best way to diagnose placenta previa. The exam should be gentle and fairly fast. There may be some spotting after the exam. But, it is considered safe. ...Read more

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Can i have the 3d ultrasound to detect fetus abnormalities during third trimester?

Can i have the 3d ultrasound to detect fetus abnormalities during third trimester?

Ask you MD: You need to ask your MD that question because they are best able to interpret any findings as well with the exam. ...Read more

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Can lifting heavy objects in third trimester cause placenta abruption ? Does it affect the baby in any way or just affect me ?

Can lifting heavy objects in third trimester cause placenta abruption ? Does it affect the baby in any way or just affect me ?

Not likely: In general lifting objects does not cause problems for pregnancy but obviously if something is too heavy for you or makes you uncomfortable then it should be avoided. ...Read more

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Can lifting heavy objects in third trimester cause placenta abruption ? Does it affect the baby in any way or just affect me ?

Can lifting heavy objects in third trimester cause placenta abruption ? Does it affect the baby in any way or just affect me ?

Not likely: In general lifting objects does not cause problems for pregnancy but obviously if something is too heavy for you or makes you uncomfortable then it should be avoided. ...Read more

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Male fetus ultrasound (35w 4d) which showed an enlarged fetal bladder. Normal amniotic fluid and kidneys. Is this typical in third trimester?

Male fetus ultrasound (35w 4d) which showed an enlarged fetal bladder. Normal amniotic fluid and kidneys. Is this typical in third trimester?

Specific case: This is a very specific case that requires a doctor to evaluate the exact findings of the sonogram to determine if it is normal or not. You will need to seek clarification from your doctor regarding the term “enlarged bladder” to determine if further testing, follow up sonograms or a referral to a perinatologist is indicated. ...Read more

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Dr's ultrasound at office told me i had complete placenta previa. 3 others done at hospital said only anterior placenta.Is dr's ultrasound tech wrong?

Dr's ultrasound at office told me i had complete placenta previa. 3 others done at hospital said only anterior placenta.Is dr's ultrasound tech wrong?

Not necessarily: It's possible that you had a placenta previa early in pregnancy (this is common). As the uterus grows during the course of pregnancy, the placenta is "pulled" up and typically migrates away from the cervix. ...Read more

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Previous c section, placenta anterior 4-5 cm above scar, no acretta now but can it develop in 3rd trimester?

Previous c section, placenta anterior 4-5 cm above scar, no acretta now but can it develop in 3rd trimester?

It may!: You need repeat sonograms during pregnancy to evaluate the situation. The problem would be if you develop placenta increta, or percreta because these could make your anatomy more difficult to deal with, especially if this would occur at the previous incision site! Be vigilant and know your situation! ...Read more

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Can full placenta previa actually resolve itself if diagnosed at around 12 weeks? It'd my 2nd preg& I am scheduled for c-section anyway.

Can full placenta previa actually resolve itself if diagnosed at around 12 weeks? It'd my 2nd preg& I am scheduled for c-section anyway.

Yes, >90% of time.: I don't even look at the placenta before 14-16 weeks because it is frequently previa without any significance clinically. If it covers the internal cervical os and overlaps by at least 2.5 cm in all directions (one inch) at the anatomy scan (18-22 weeks), then it shall persist as previa at delivery with 99% certainty. If it is >2 cm away from the os at term vaginal delivery is feasible 63% of time. ...Read more

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I'm 19 wks gestation, my first baby, I've complete placenta previa, previously2 D&c,2 hysteroscopy What is my chance to reach term? IO dilat. is 6 mm.

I'm 19 wks gestation, my first baby, I've complete placenta previa, previously2 D&c,2 hysteroscopy What is my chance to reach term? IO dilat. is 6 mm.

Placenta previa: I'm just a pediatrician, so I can't give you exact percentages of getting to term with a complete previa, but the odds are not good. That doesn't mean you can't have a great kid!. It's time to talk to maternal-fetal medicine specialist about when and how to limit workload, intercourse and when to think about steroids to enhance maturation of baby's lungs. Every day you stay pregnant is a win... ...Read more

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Wife is 19wks in preg. 1st kid. 17wks diagnosed w full placenta previa. What r d chances of placenta moving up? And can she fly a 2hr flight 27wks in?

Wife is 19wks in preg. 1st kid. 17wks diagnosed w full placenta previa. What r d chances of placenta moving up? And can she fly a 2hr flight 27wks in?

Discuss with OB.: Flying is ill advised during pregnancy with risk for serious bleeding as is the risk with placenta previa. It's a big risk, should anything happen, you won't be able to land in time to save you or the baby in the event of bleeding. Repeat US will help determine if the placenta changes position, but an abundance of caution is best in this case. ...Read more

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Why is there bleeding with placenta previa?

Why is there bleeding with  placenta previa?

Leaky vessels: Previa: Placenta overlies the cervix/birth canal. Gr 1 means placenta is close, Gr 4 means it's directly overlying/blocking the baby's exit -- high chance of preterm labor & bleeding; you'd need a C/S at 36-37wks. More common in woman w/ hx of C/S & smoking. Not much you can do but wait. If dx'ed early, the uterus still grows/stretches and a placenta can migrate away even in 3rd tri. Follow w/ US. ...Read more

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Why is the bleeding painless from placenta previa?

Why is the bleeding painless from placenta previa?

No contractions.: Because the bleeding does not involve the contractile part of the uterus, only the placenta over the cervix. The placenta is devoid of innervation, therefore the mother does not experience pain in bleeding previa unless preterm labor is also present. ...Read more

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Can you deliver vaginally if placenta previa corrects itself?C

Can you deliver vaginally if placenta previa corrects itself?C

Yes it is possible: If it corrects itself completely you should be able to deliver vaginally. Check with your ob. ...Read more

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I have complete placenta previa at 33weeks and sufering from constipation?

I have complete placenta previa at 33weeks and sufering from constipation?

Take colace (docusate sodium).: Straining for defecation, heavy lifting, sexual intercourse can all trigger catastrophic bleeding in cases of placenta previa. Take colace (docusate sodium) regularly (100 mg 2-3 times daily) to avoid constipation, drink plenty of water, avoid all exercise or intercourse. Stay close to your maternity hospital and go to the er via ambulance as soon as you experience any vaginal bleeding. ...Read more

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How dangerous is C-section with placenta previa? I have heard there is a high risk of bleeding out!?

Increased risk.: What you have heard is correct; exsanguination can occur in undiagnosed accreta/previa in small hospitals with inexperienced surgeon(s). Seek expert care if uou have placenta previa (including maternal-fetal medicine ultrasound and consultation), avoid all nsaids/sex/travel/unnecessary car rides/heavy lifting/straining/constipation and deliver in a large, tertiary care hospital [blood bank/icu]. ...Read more

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Dr. Brad Goldenberg
143 doctors shared insights

Placenta Blocks Cervix (Definition)

A previa is when a placenta entirely covers the opening of the cervix into the uterus (internal os). It is a reason for a cesarean section and if bleeding occurs and stops it may be a ...Read more


Placenta (Definition)

The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via ...Read more