Placental Migration Demonstrated by Ultrasonography

King, Donald L.

doi:10.1097/00006254-197403000-00009

Cited by 7 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is obvious that placenta previa of some degree is a very common cause of recurrent bleedings, for in the present examination this location of the placenta was observed in 54 per cent during the first episode of bleeding. The tendency for placental "migration" away from the cervical area during the last trimester of pregnancy observed in this study agrees with the earlier reports (4,6). Though the placentas with low insertion were not included in the previa group, the frequency of definite placenta previas was 17 per cent and this was the most common etiological cause of the bleeding.…”

Section: Discussionsupporting

confidence: 91%

Vaginal Bleeding in the Last Two Trimesters of Pregnancy a Clinical and Ultrasonic Study

Jouppila

1979

Acta Obstet Gynecol Scand

View full text Add to dashboard Cite

Ninety-seven cases of vaginal bleeding during the second and third trimesters of pregnancy are presented with special reference to the follow-up observations and perinatal parameters after the first bleeding and ultrasonic determination of placental site. The perinatal mortality rate was 11 per cent and the rate of premature deliveries 23 per cent. In the cases of recurrent bleeding episodes (N = 33), the corresponding frequencies were 22 and 35 per cent. Placenta previa of some degree was diagnosed by ultrasound during the first episode of bleeding in 36 cases. Although the placenta was observed to "move" upwards from the internal os of cervix in 20 of these patients during the last few weeks of pregnancy, final placenta previa (N = 16) was the most common definite etiological factor behind the bleeding. The high frequency of perinatal complications associated with these pregnancies emphasizes, despite reliable localization of the placenta, the importance of a careful follow-up until delivery.

show abstract

Section: Discussionsupporting

confidence: 91%

Vaginal Bleeding in the Last Two Trimesters of Pregnancy a Clinical and Ultrasonic Study

Jouppila

1979

Acta Obstet Gynecol Scand

View full text Add to dashboard Cite

show abstract

“…Consequently, placentas with few lobes have been considered to have an insufficient spiral artery supply (4). The connection found here between few lobes and abnormal configuration is in line with the idea of a primary implantation at a site with poor vascular supply (16,17). It is also of practical interest that the macroscopical estimate of the number of lobes could be correlated to fetal size, extrachorial placentation and marginal cord insertion.…”

Section: Discussionsupporting

confidence: 86%

Relationship Between Placental Shape, Cord Insertion, Lobes and Gestational Outcome

Nordenvall

Sandstedt

Ulmsten

1988

Acta Obstet Gynecol Scand

View full text Add to dashboard Cite

Singleton placentas from 330 consecutive births were examined for size, shape, cord insertion, allanto-chorial vascular pattern and lobes. These factors were considered regarding possible interactions and correlation to pregnancy and perinatal outcome. Marginal cord insertion was correlated to extrachorial and bilobate placenta and to magistral wr mixed allanto-chorial vascular pattern. A paucity of lobes (less than 15) was associated with extrachorial placenta, marginal cord insertion, pre-eclampsia, gestational age less than 38 weeks and small for gestational age infants. The common denominator for abnormal configuration and marginal cord insertion seemed to be the paucity of lobes.

show abstract

“…One of the theories is a process of so-called placental trophotropism 3 or dynamic placenta-tion. 4 It is related to atrophy of thin placental margins due to a poor vascular supply, compared with other placental regions that continue to grow and therefore migrate toward more vascular sites. In addition, it is also possible that the placenta only appears to migrate to a more fundal position with advancing pregnancy because of more rapid growth of the lower uterine segment.…”

mentioning

confidence: 99%

“…In addition, it is also possible that the placenta only appears to migrate to a more fundal position with advancing pregnancy because of more rapid growth of the lower uterine segment. 4,5 It seems likely that both of these mechanisms operate in placental migration. Regardless of the mechanism that is responsible for placental migration, it was noted that the mean rates of placental migration were 0.3 and 5.4 mm/wk for those patients who had cesarean delivery (CD) versus normal vaginal delivery, respectively.…”

mentioning

confidence: 99%

A Sonographic Assessment of Different Patterns of Placenta Previa ???Migration??? in the Third Trimester of Pregnancy

Predanic

Perni

Baergen

et al. 2005

Obstetrical & Gynecological Survey

View full text Add to dashboard Cite

Preeclampsia has been associated with an increased risk of cardiovascular disease and also with a lowered risk of breast cancer later in life. These associations may represent underlying metabolic changes. The investigators undertook a case-control study in which metabolic profiles were examined in women who completed their pregnancies at age 30 and older and had no serious chronic disorders. Thirteen women had experienced preeclampsia in their first pregnancies, whereas 13 others had no complications. Preeclampsia was defined as newly developed hypertension of pregnancy exceeding 140/90 mm Hg and proteinuria of at least 0.3 g/24 hours. The groups were matched for race/ethnicity, current age at the time of delivery, and current age.Women having preeclampsia were likelier than control women to be primiparous, tended to be heavier, and had higher resting diastolic blood pressure. There were no significant group differences in age at first delivery, age at first menses, current age, racial/ethnic distribution, a history of breast feeding, or a family history of breast cancer. In the overall group, body mass index correlated positively with serum levels of triglycerides, insulin, and glucose as well as with the fasting insulin resistance index. Women with a history of preeclampsia had significantly higher levels of fasting serum triglycerides, insulin, and glucose, and lower levels of fasting high-density lipoprotein than women without complications. In addition, they had a higher fasting insulin resistance index. A history of preeclampsia correlated with increased levels of insulin-like growth factor-binding protein-3 (IGFBP-3) and a higher ratio of IGFBP-3 to IGF-1 (insulin-like growth factor-1). Controlling for obesity did not substantially alter these associations. Adjusting for obesity or parity did not significantly alter the relationship between past preeclampsia and markers of dyslipidemia or reduced levels of IGF-1. No major differences emerged after excluding obese women. The case and control women had comparable fasting serum levels of total cholesterol and IGF-1.In women having preeclampsia in a former pregnancy, reduced bioavailability of IGF-1, relative insulin resistance, and dyslipidemia may persist. These changes may account, at least in part, for the increased risk of cardiovascular disease as well as the lowered risk of breast cancer observed in these women. ABSTRACTAlthough immediate termination of pregnancy in cases of preeclampsia does benefit the mother, it often is not in the best interest of the fetus, especially if carried out long before term. A program of temporizing management has been adopted for use in severe early-onset preeclampsia, the goal being to correct maternal hemodynamics through plasma expansion and pharmacologic vasodilatation. Short-term benefit has been demonstrated with this approach. The question of whether this benefit is sustained was examined in 222 consecutive infants who lived at least 12 months and whose mothers had severe preeclampsia (diastolic blood pressure of ...

show abstract

Placental Migration Demonstrated by Ultrasonography

Cited by 7 publications

References 0 publications

Vaginal Bleeding in the Last Two Trimesters of Pregnancy a Clinical and Ultrasonic Study

Vaginal Bleeding in the Last Two Trimesters of Pregnancy a Clinical and Ultrasonic Study

Relationship Between Placental Shape, Cord Insertion, Lobes and Gestational Outcome

A Sonographic Assessment of Different Patterns of Placenta Previa ???Migration??? in the Third Trimester of Pregnancy

Contact Info

Product

Resources

About