What are the three types of placenta?
Summary of Species Differences in Placental Architecture
| Type of Placenta | Common Examples |
|---|---|
| Diffuse, epitheliochorial | Horses and pigs |
| Cotyledonary, epitheliochorial | Ruminants (cattle, sheep, goats, deer) |
| Zonary, endotheliochorial | Carnivores (dog, cat, ferret) |
| Discoid, hemochorial | Humans, apes, monkeys and rodents |
How many types of placenta are abnormal?
These placental disorders are called placenta previa, placenta accreta, placenta increta or placenta percreta. Placental disorders are usually diagnosed by ultrasound in the second trimester (about 18 to 20 weeks into a pregnancy). Placenta previa occurs when the placenta covers some or all of the cervix.
What are the abnormalities of placenta?
Introduction.
Which side the placenta is on boy or girl?
According to the theory, if your placenta has implanted on the left side of your body, there is a 97.5% chance you are having a girl. If your placenta is on the right side of your body, there is a 97.2% chance you are having a boy.
Is the placenta overlooked in normal gestation?
The placenta is often overlooked in the routine evaluation of a normal gestation, receiving attention only when an abnormality is detected. In this article, we present the imaging characteristics of the normal and abnormal placenta.
What do radiologists need to know about the placenta?
Familiarity with the normal and abnormal imaging appearance of the placenta along with the multimodality and methodical approach for evaluation of its related abnormalities is necessary, so that radiologists can alert clinicians regarding appropriate prompt management decisions.
What are the pathologic conditions of the placenta?
Pathologic conditions of the placenta include placental causes of hemorrhage, gestational trophoblastic disease, retained products of conception, nontrophoblastic placental tumors, metastases, and cystic lesions. Sonography remains the imaging modality of choice for evaluation of the placenta.
When does the placenta start to become lobulated?
Between 24 and 31 weeks gestation, the placenta becomes slightly lobulated and multiple septa between the lobules start to be conspicuous, leading to increased heterogeneity with increasing gestational age ( 11 ).