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Placenta Previa

Reviewed 06/2018
 


BASICS

DESCRIPTION

  • Complete/total previa: Placenta covers the entire os.

  • Partial previa: Placenta covers part of internal cervical os.

  • Marginal previa: Placental edge is adjacent to cervical os by ultras...

DIAGNOSIS

HISTORY

  • Painless vaginal bleeding seen in 70–80% of cases

  • Initial bleeding seen prior to 30 weeks in almost 1/3 of pregnancies

  • Placenta previa is commonly identified during routine dating and a...

TREATMENT

GENERAL MEASURES

  • Avoid vaginal intercourse and strenuous exercise after 20 weeks.

  • Avoid vaginal exams, sexual intercourse, douching, or other vaginal manipulation.

  • Rh-negative women should rece...

ONGOING CARE

FOLLOW-UP RECOMMENDATIONS

  • Repeat US of placenta location if last US was done at <37 weeks' gestational age.

  • Placentae should be sent for pathologic evaluation.

DIET

No restrictions once st...

REFERENCES

1
Rao KP, Belogolovkin V, Yankowitz J, et al. Abnormal placentation: evidence-based diagnosis and management of placenta previa, placenta accreta, and vasa previa. Obstet Gynecol Surv.  ...

ADDITIONAL READING

CODES

ICD10

  • O44.10 Placenta previa with hemorrhage, unspecified trimester

  • O44.11 Placenta previa with hemorrhage, first trimester

  • O44.12 Placenta previa with hemorrhage, second trimester

  • O44.00 Placenta p...

CLINICAL PEARLS

  • Placenta previa is a major cause of vaginal bleeding in the 2nd and 3rd trimesters.

  • Many pregnancies diagnosed with placenta previa will have resolution by term.

  • Do not perform digital c...

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