Fetal Skull Anatomy and Measurements

The video tutorial discusses the fetal skull, its bones, areas, sutures, fontanels, and diameters. It highlights the significance of the fetal skull in childbirth, explaining how its structure and flexibility affect delivery. The tutorial covers the different zones of the skull, the bones involved, and the sutures and fontanels that allow for molding during birth. It also details the various diameters of the fetal skull and their relevance to different presentations during labor.

What is the primary reason the fetal skull is challenging to pass through the mother's pelvic canal?

• Its large size compared to the fetal body

• Its hard bony nature

• Its flexibility

• Its irregular shape

Which area of the fetal skull is bounded by the bregma and coronal sutures anteriorly?

• Occiput

• Vertex

• Face

• Base

How many frontal bones are present in the fetal skull at birth?

• One

• Three

• Four

• Two

Which suture lies between the two parietal bones?

• Coronal suture

• Sagittal suture

• Lambdoid suture

• Frontal suture

What is the shape of the anterior fontanelle?

• Circular

• Square

• Triangular

• Diamond

At what age does the anterior fontanelle typically ossify?

• 36 months

• 24 months

• 12 months

• 18 months

Which diameter is the engaging diameter in case of complete flexion of the fetal head?

• Suboccipitobregmatic

• Occipitofrontal

• Mentovertex

• Suboccipitofrontal

What is the length of the biparietal diameter?

• 8 cm

• 11.5 cm

• 9.5 cm

• 10 cm

Which diameter is involved in face presentation with complete extension of the fetal head?

• Submentovertical

• Suboccipitobregmatic

• Occipitofrontal

• Pragmatic

What is the measurement of the mental vertical diameter?

• 11.5 cm

• 9.5 cm

• 10 cm

• 14 cm