Conjoined Twins and Pregnancy Labor Process
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Questions and Answers

What are the three stages of labor?

  • Effacement and dilation of the cervix, delivering the fetus, delivering the placenta and fetal membranes (correct)
  • Rupture of amniotic fluid, crowning, and placental expulsion
  • Initiation, effacement, and amniotic rupture
  • Dilation, contractions, and placental expulsion

    • What name is given to the condition where there is too much space (fluid accumulation) in the amniotic cavity?

  • Anencephaly
  • Hydrocephalus
  • Amniotic band syndrome
  • Polyhydramnios (correct)

    • What is the significance of having one amnion, one chorion, and one placenta for conjoined twins?

  • It increases the risk of infection
  • It indicates the twins are not truly identical (correct)
  • It suggests the twins are of the opposite gender
  • It reduces the chances of survival

    • What stage of labor involves effacement and dilatation of the cervix?

    <p>First stage</p> Signup and view all the answers

    What term is used to describe structural, behavioral, functional, and metabolic disorders present at birth?

    <p>Birth defects</p> Signup and view all the answers

    What is the role of the placenta with respect to protecting the fetus from toxic factors?

    <p>It acts as a barrier and provides full protection</p> Signup and view all the answers

    During which weeks of gestation does physiological umbilical herniation occur?

    <p>6th to 10th</p> Signup and view all the answers

    What is the name of the defect associated with loops of bowel herniating into the umbilical cord?

    <p>Omphalocele</p> Signup and view all the answers

    What type of membrane covers the bowel in an omphalocele?

    <p>Amnion</p> Signup and view all the answers

    Which structure develops from visceral (splanchnic) mesoderm?

    <p>Septum transversum</p> Signup and view all the answers

    What is the name of the cavity that forms between the septum transversum and the stalk of the yolk sac?

    <p>Intraembryonic body cavity</p> Signup and view all the answers

    What is the name of the fold that forms when the cranial end of the embryo grows and curves?

    <p>Cranial neural fold</p> Signup and view all the answers

    What structures hold the neural and gut tubes together during embryonic development?

    <p>Mesoderm</p> Signup and view all the answers

    What is the space between the visceral and parietal layers of the lateral plate mesoderm called?

    <p>Primitive body cavity</p> Signup and view all the answers

    Which structure forms the amnion that surrounds the embryo during development?

    <p>Lateral plate mesoderm</p> Signup and view all the answers

    What can happen if the ventral body wall fails to close properly during development?

    <p>Ectopia cordis</p> Signup and view all the answers

    Which layer of the lateral plate mesoderm forms the visceral layer of the serous membranes?

    <p>Visceral layer</p> Signup and view all the answers

    What is the region of attachment between the gut tube and the yolk sac known as?

    <p>Vitelline duct</p> Signup and view all the answers

    What condition occurs when loops of bowel fail to return to the body cavity during gestation?

    <p>Omphalocele</p> Signup and view all the answers

    What is the name of the thick mesodermal tissue between the thoracic cavity and the yolk sac?

    <p>Septum transversum</p> Signup and view all the answers

    Which membrane covers the bowel in an omphalocele?

    <p>Amnion</p> Signup and view all the answers

    What structure forms the amnion that surrounds the embryo during development?

    <p>Septum transversum</p> Signup and view all the answers

    What can be associated with an omphalocele, in addition to the actual herniation of the bowel?

    <p>Chromosome abnormalities</p> Signup and view all the answers

    What is the name of the phase when loops of bowel herniate into the umbilical cord during gestation?

    <p>Physiological umbilical herniation</p> Signup and view all the answers

    What is the term used to describe the process where the lateral body wall folds move ventrally and fuse in the midline?

    <p>Pleuropericardial folding</p> Signup and view all the answers

    Failure of the ventral body wall to close properly during development can lead to which of the following defects?

    <p>Gastroschisis</p> Signup and view all the answers

    Which structure forms the umbilical cord during development?

    <p>Connecting stalk</p> Signup and view all the answers

    What is the space between the visceral and parietal layers of lateral plate mesoderm called?

    <p>Intraembryonic cavity</p> Signup and view all the answers

    What defect is associated with loops of bowel herniating outside the abdominal cavity into the umbilical cord region?

    <p>Omphalocele</p> Signup and view all the answers

    During development, which layer of mesoderm forms the visceral layer of the serous membranes covering abdominal organs?

    <p>Splanchnic mesoderm</p> Signup and view all the answers

    What are the three stages of labor?

    <p>Effacement and dilatation of the cervix, delivery of the fetus, delivery of the placenta and fetal membranes</p> Signup and view all the answers

    What term is used to describe disorders present at birth relating to structure, behavior, function, and metabolism?

    <p>Congenital anomalies</p> Signup and view all the answers

    What structural feature is common in conjoined twins regarding the membranes and placenta?

    <p>One amnion, one chorion, and one placenta</p> Signup and view all the answers

    What initiates the beginning of labor in most cases?

    <p>Signals that are not clearly understood</p> Signup and view all the answers

    What is the medical term for the condition of fluid accumulation in the amniotic cavity as seen on an ultrasound?

    <p>Hydramnios</p> Signup and view all the answers

    What is the role of the placenta concerning the protection of the fetus from toxic factors?

    <p>Acts as a selective filter for certain toxic substances</p> Signup and view all the answers

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