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Fetal Human Skull 31 Weeks
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Fetal Human Skull 31 Weeks BC-180
$75.00

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Estimated at 31 weeks, this Bone Clones® cast of a Human Fetal skull exhibits characteristics of prenatal development. The cartilaginous Fontanelles are clearly visible in the Anterior, Mastoid and Sphenoid regions of this skull. These Fontanelles ossify (turn to bone) over time. Sutures will form along these bony plates to help fuse the skull together as the individual ages. The jaw is detached. Please see our comparative sets: BC-182-SET, BC-194-SET and BC-228-SET.

Our consultant describes his reasoning for determining the age, "I aged the fetal skull by means of the palate which is completely closed at 12 weeks, cranial vault bones (ossified in center portions) base of cranium, presphenoid, postsphenoid, basiocciput. According to these findings, the presphenoid is about 2/3 calcified, the post about 3/4 and the basiocciput is 100% calcified. This puts the fetus at somewhere around 31 weeks, possibly even 28 because of the BPD (Biparietal Diameter). Studies of all ethnic groups ,except people from India, show BPD of 60.5 to 69.2 mm for 24-28 weeks. This skull is 65 mm, the cranial length is 77.5. The cephalic index is 84. This is ok for this age."

Scientific Name Catalogue # Size Price
Homo sapiens BC-180 3 1/4 L, 2 1/2 W, 2 1/2 H $75.00

Related Products Also Available
(click on the name to view)
Product Name
Fetal Human Skull 13 Weeks BC-215
Fetal Human Skull 20 Weeks BC-194
Fetal Human Skull 17 Weeks BC-218
Fetal Human Skull 21 1/2 Weeks BC-220
Fetal Human Skull 29 Weeks BC-195
Fetal Human Skull 30 Weeks BC-225
Fetal Human Skull 32 Weeks BC-181
Fetal Human Skull 34 Weeks BC-226
Fetal Human Skull 35 Weeks BC-227
Fetal Human Skull 40 Weeks BC-182
Fetal Human Skull Full Term 40 1/2 Weeks BC-228
Fetal Human Skull 40 weeks (full term)with Calvarium Cut BC-281
Fetal Human three Skull Set BC-182-SET
Fetal Human Five Skull Set BC-194-SET
Human Fetal Skulls Set of 12 BC-228-SET
Human Fetal Skeleton SC-181
Disarticulated Human Fetal Skeleton Full Term SCM-186-D

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