Early identification of placenta praevia

Ruparelia, B. A.; Chapman, Michael

doi:10.1111/j.1471-0528.1991.tb10353.x

Cited by 5 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10 In this study, placental migration and the likelihood of vaginal delivery were observed more often and with more statistical significance in anterior than in posterior placenta previa. This finding is similar to the study by Ruparelia and Chapman, 11 who stated in their correspondence that they found no placental migration in their patients with posterior placenta previa.…”

Section: Discussionsupporting

confidence: 80%

“…Furthermore, this phenomenon is more pronounced in the anterior than in the posterior low-lying placenta. [10][11][12] The aim of this article is to report the incidence of placental migration and mode of delivery in cases of placenta previa diagnosed by transvaginal sonography in the early third trimester (i.e., between 28-32 weeks' gestation) at the Ultrasound Unit of the Department of Obstetrics and Gynecology at King Khalid University Hospital, Riyadh, Saudi Arabia. …”

mentioning

confidence: 99%

See 1 more Smart Citation

Placental Migration and Mode of Delivery in Placenta Previa: Transvaginal Sonographic Assessment During the Third Trimester

Ghourab

Al-Jabari

2000

Ann Saudi Med

View full text Add to dashboard Cite

Background:The objective of this study was to assess the role of serial transvaginal sonography (TVS) in predicting placental migration and mode of delivery in pregnancy complicated by placenta previa during the third trimester. Patients and Methods: In this prospective observational study, all the cases had confirmed diagnosis of placenta previa before 32 weeks' gestation. TVS was performed between 28 and 32 weeks' gestation for 287 patients with either clinical suspicion or previous sonographic diagnosis of placenta previa. The lower placental edge was found to cover the internal cervical os, or was found to be within 3 cm from it in 63 patients. A two-weekly TVS was performed for every patient until delivery, or until migration of the lower placental edge to a distance of more than 3 cm from the internal cervical os was observed. Detailed information on the placental postion, its distance from the internal cervical os, and its relation to the presenting part were recorded at each examination. Results: Placental migration to a distance of more than 3 cm from the internal cervical os occurred in 24 patients (38%) by 36 weeks' gestation. Of the 63 patients, 19 (30.2%) delivered vaginally. The last scan of these patients revealed that the distance between the internal cervical os and the lower placental margin were more than 2 cm and 3 cm in the anterior and posterior placenta previa, respectively, and the presenting parts were below the placental margin. Placental migration was not observed sonographically in any of the eight patients with posterior placenta previa when its lower edge was initially located within 1 cm from the internal os. It was also not observed in either the 16 patients with total placenta previa, or in any of the other patients beyond 36 weeks' gestation. Conclusion: Posterior placenta previa lying within 1 cm from the internal cervical os and total placenta previa do not migrate during the third trimester. On the other hand, other types of placenta previa may migrate but not beyond 36 weeks' gestation. The mode of delivery does not depend only on the placental degree but also on the placental position (anterior or posterior), and the relationship between the presenting part and the lower placental edge.

show abstract

Section: Discussionsupporting

confidence: 80%

mentioning

confidence: 99%

Placental Migration and Mode of Delivery in Placenta Previa: Transvaginal Sonographic Assessment During the Third Trimester

Ghourab

Al-Jabari

2000

Ann Saudi Med

View full text Add to dashboard Cite

show abstract

“…As shown in table 2, anteriorly situated low lying placenta showed lesser migration (70.4%) than posteriorly situated placenta (95.3 %) which is statistically significant. Ruparelia et al, 5 Shravage Jyotsna et al 8 found in their study of placenta previa anteriorly situated low lying placenta showed lesser migration (64.51%) (20/31) when compared to posteriorly situated placenta (90%) (9/10).…”

Section: Discussionmentioning

confidence: 91%

“…This phenomenon is more pronounced in anterior than in posterior low-lying placenta. 5 Most of the studies on low lying placenta are retrospective studies, case reports and concentrated on placental migration. The aim of this study is to evaluate pregnancy outcome of cases where a low-lying placenta defined as margin of placenta at a distance of <2 cm from internal os as detected at 18-22 weeks of pregnancy.…”

Section: B a C K G R O U N Dmentioning

confidence: 99%

Outcome of low-Lying placenta at 18-22 WeeksA Prospective Observational Study

Karmakar¹,

Paria²,

Chattopadhyaya³

2019

jemds

View full text Add to dashboard Cite

BACKGROUND Haemorrhage contributes to 25% of maternal deaths worldwide. Placenta previa i.e. Placenta attached to lower uterine segment, is an important cause of antepartum and postpartum haemorrhage and is associated with some foetal and neonatal complications as well. Most of the low-lying placentas found at early weeks of pregnancy migrate to upper uterine segment before term or before delivery. METHODS This prospective observational study was conducted on the outcome of low-lying placenta at 18-24 weeks, in the Department of Gynaecology and Obstetrics, NRS Medical College, Kolkata from May 2013 to April 2014. 75 asymptomatic women with low lying placenta (distance less than or equal to 2 cms from the internal cervical os), discovered by trans-abdominal USG and/or transvaginal sonography at 18 to 22 weeks of gestation. They were observed up to 6 weeks post-partum for maternal and foetal complications. RESULTS Placenta was found to migrate to upper uterine segment in 77.3 % cases. Rate of migration decreased in placenta closer to os and overlapping the os. Migration was more in posterior placenta than anterior placenta which was statistically significant. Persistence of low-lying placenta at term was associated with higher age and increasing parity of the mother; in both these situations the association was statistically significant. H/o previous Caesarean section was associated with persistence of low-lying placenta about 1.9 times more commonly than in cases with no such history. Prior termination of pregnancy (MTP) was associated with higher chance of persistence of low lying placenta at term or delivery (27.7%) with odds ratio of 1.44; whereas multiple pregnancy (odd's ratio= 1.1) and prior placenta previa (odd ratio 1.1) are minor risk factors for persistence of low lying placenta at term or delivery. Low lying placenta if associated with bleeding in early months showed less chance of migration at term or delivery. Higher incidence of mapresentation, atonic PPH, preterm birth and iatrogenic CS was found in persistent placenta previa group. Unlike other complications, there is slightly increased preterm delivery rate in migrated group also. Among foetal complications, IUGR and congenital anomalies, birth asphyxia, neonatal death were more common in persistent placenta previa group compared to migrated group, which was statistically significant. CONCLUSIONS So, cases found with low lying placenta in early months, should be assessed carefully regarding presence of risk factors of persistence in lower segment. Mother should be counselled regarding this possibility of migration and also maternal and foetal risks in case placenta persists in low position.

show abstract

Placental localisation in early pregnancy

Stephens¹

1991

The Lancet

View full text Add to dashboard Cite

Early identification of placenta praevia

Cited by 5 publications

References 3 publications

Placental Migration and Mode of Delivery in Placenta Previa: Transvaginal Sonographic Assessment During the Third Trimester

Placental Migration and Mode of Delivery in Placenta Previa: Transvaginal Sonographic Assessment During the Third Trimester

Outcome of low-Lying placenta at 18-22 WeeksA Prospective Observational Study

Placental localisation in early pregnancy

Contact Info

Product

Resources

About