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Doctor insights on: Placenta Previa Guidelines

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Is placenta previa hereditary?

Is placenta previa hereditary?

no: Placenta previa is an obstetric complication in which the placenta is inserted partially or wholly in lower uterine segment.It can sometimes occur in the later part of the first trimester, but usually during the second or third. It is a leading cause of antepartum haemorrhage (vaginal bleeding). It affects approximately 0.4-0.5% of all labours. ...Read more

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Dr. Creighton Wright
146 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


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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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Flying at 14 weeks pregnancy with placenta previa ok?

Flying  at 14 weeks pregnancy with placenta previa ok?

Ask your OB MD: You need to ask your currently treating OB md who will handle any complications should there be some. ...Read more

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Does placenta previa require treatment?

Maybe: If a placenta previa is still present at term, a cesarean delivery is indicated. ...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?

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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Could placenta previa lead to placenta percreta?

Could placenta previa lead to placenta percreta?

PP can be percreta: A placenta prévia can invade the uterine and cervical tissues and be associated with a placenta increta and placenta percreta. ...Read more

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How does placenta previa cause preterm delivery?

Bleeding and Cntrxns: 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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What's the difference between partial placenta previa and placenta previa?

Distance form cervix: 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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Posteria placenta @9weeks- then placenta previa. @ 17 weeks? Will it move again?

Yes, possible!: 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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Can placenta accreta be missed at delivery?

Can placenta accreta be missed at delivery?

Very definitely: Unfortunately, placenta accreta is often diagnosed at the time post delivery when a cotyledon(plug) of placenta is missing or the placenta itself does not detach normally. At that point, aggressive measures to 'detach" the placenta may result in massive hemorrhage and the resultant post apocalyptic diagnosis of placenta accreta. ...Read more

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Is it abruptio or placenta previa that bleeds when placenta is low?

Is it abruptio or placenta previa that bleeds when placenta is low?

May be both: A previa is usually painless bleeding when the cervix is changing (dilating) causing bleeding from torn vessels being sheared off. It is a type of abruption although any bleeding from a detaching placenta is strictly called an abruption. These are usually away from the cervix and can be associated with cramping, pain, or heavy bleeding. If you have a previa, let your doc know if you bleed. ...Read more

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Does smoking increase the risk for placenta previa?

Yes: 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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28 wks pregnant, previous c section, placenta anterior, no acretta now- placenta is 4cm above c section scar. Could acretta still develop at this pt?

28 wks pregnant, previous c section, placenta anterior, no acretta now- placenta is 4cm above c section scar. Could acretta still develop at this pt?

Yes but low risk: Acretta can develop even in women who have never had a c/section. Fortunately this is rare. The risk is much higher if the placenta is covering the prior c/section scar. With the placenta 4cm from the scar, your risk is very low (but not zero). Best wishes! ...Read more

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How rare is placenta abruption with polyhydramnios?

Less rare: Placental abruption is one of the increased risks associated with poly-hydramnios. Even then it is still fairly uncommon. ...Read more

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Is having a marginal previa/low-lying placenta considered high risk?

Marginal previa: A marginal previa or a low lying placenta is usually diagnosed by ultrasound. Early in a pregnancy ultrasound can over diagnose the condition. Risk will depend upon whether you have had any bleeding with the diagnosis. A 28 week ultrasound is usually recommended to better visualize where the placenta actually is. ...Read more

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Placenta tear at 18 weeks with history of placenta abruption. Should I be concerned?

Not necessarily: Since the placenta cannot be directly examined, I am guessing that they are seeing an apparent collection of blood behind the placenta on ultrasound. These "subchorionic hematomas" are actually fairly common, are usually limited, and are not normally clinically significant. The chance of an evolving abruption is small but your history increases your risk. Monitor it and hopefully it is stable. ...Read more

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Type of c- section for vasa previa?

Type of c- section for vasa previa?

Usually low transver: It should be ok to perform a low -transverse cesarean section with a vasa previa. Regards Dr M ...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