Embryo Flashcards
The first indication of gastrulation in the embryo is?
Formation of the primitive stream
A 20-year-old woman presented to ER with severe abdominal pain on the right side with signs of internal bleeding, she missed her last menstrual period. Which of the following disorders must be included as an option in the diagnosis?
Ectopic tubal pregnancy.
Which of the following must degenerate for blastocyst implantation to occur?
Zona pellucida
During the later stages of pregnancy maternal blood is separated from fetal blood by the:
Syncytiotrophoblast and fetal endothelium
At the beginning of week 3 of development (day 17), what is the composition of the embryonic disc?
Ectoderm, mesoderm, &endoderm
The prechordal plate marks the site of the future:
Mouth
A 28-year-old pregnant woman experiences repeated episodes of red vaginal bleeding at week 28, 32 & 34 of pregnancy. The bleeding spontaneously subsided each time. Use of ultrasound shows that the placenta is located in the lower right portion of the uterus over the internal os. What is the diagnosis
Placenta previa
The maternal & fetal components of the placenta are?
Decidua basalis & villous chorion
Which of the following best describes the placental components of dizygotic twins?
Two placentas, two amniotic sacs, two chorions
The femur is derrived from
Lateral plate mesoderm
Patterning and initial growth of the limbs primarily begins
During weeks 4-8 of development
A baby born with webbing between her fingers. The doctor stated that this minor defect can be easily corrected surgically. The most likely diagnosis is
Syndactyly
During weeks 6-8, the upper limb will rotate
Laterally 90 degrees
During weeks 9-8, the lower limb bud will rotate
Medially 90 degrees
