Pre-Fertilisation
Where is the secondary oocyte arrested?
Metaphase of Meiosis ll
What is the pre-cursor to the blastocyst called?
Morula
Which placental villi does not have a cytotrophoblast core?
Tertiary
Where does the mesoderm migrate to during flexion?
Underneath the ectoderm.
Where is the defect located in omphalocele?
When and where is the normal site/time of fertilisation?
Ampullary region of the fallopian tubes, 24hrs after ovulation
What is the name of the point where the embryo will later attach to the uterine wall?
Embryonic pole
Trilaminar
What are the 3 components of the mesoderm?
Paraxial, Intermediate, and Lateral Plate
What does defective flexion/fusion of folds lead to?
Anterior abdominal wall defects
What is 'middle pain' and where is it felt?
Cramping during ovulation, on one side of the lower abdomen, depending on which ovary (left or right) releases the egg.
What is the process that a zygote undergoes to become a 'morula'?
Cleavage
What are the two types of embryonic fold?
Lateral (transverse) and Cephalocaudal (Sagittal plane)
What 2 germ layers are involved in the development of limb buds?
Ectoderm and mesoderm
What is the difference between a partial mole or complete mole, in molar pregnancy?
Partial mole has foetal tissue, complete mole does not.
Thickens, increased vascularity, and increased glandular secretions.
Where is the blastula located when it hatches out of the zona pellucida?
The uterine cavity
Where does the fusion of the neural fold begin at?
The cervical region
What neurons innervate the dermatome and myotome, respectively?
Sensory and Motor
What placental development condition does not typically present as vaginal bleeding?
Placenta percreta
What is the name of the supporting cells released into the peritoneal cavity during ovulation?
Cumulus oophorus
What are the 3 main layers of the early blastocyst?
Blastocoele (yolk sac), Inner cell mass (embryoblast), outer cell mass (trophoblast)
When do the anterior neuropore and posterior neuropore close, respectively?
Day 25 and Day 27
What do the dermatome and myotome neurons grow into, respectively?
Dorsal horn of the spinal cord
Anterior horn of the spinal cord
What does folic acid reduce, to help prevent neural tube defects, and why?