PRESENTED BY:ABHILASHA VERMA

M.Sc. Prev.

PRESENTATION

ON

FETAL SKULL

FETAL SKULL

SHAPE - OVAL

AREAS OF FETAL SKULL

BONES OF FETAL SKULL

• FRONT SIDE • BACK SIDE

SUTURE OF FETAL SKULL

“Space between skull bones”

1. Frontal suture

2. Saggital suture

3. Coronal suture

4. Lambdoid suture

FONTANELLS

“ Wide gap between suture line where 2 or more suture are meet”

LANDMARKS OF FETAL SKULL

1. Occiput

2. Lambda

3. Vertex

4. Parietal eminance

5. Bregma

6. Siniciput

7. Glabella

8. Nasion

9. Mentum

TRANSVERSE DIAMETERS

1) Biparietal Dm [9.5 cm]:

Distance between parietal eminances.

2) Bitemporal Dm [ 8.5 cm]

Distance between lateral side of temporal bone or coronal suture.

ANTERIOR- POSTERIOR DIAMETER

1. SUB-OCCIPUTO BREGMATIC DIAMETER [9.5 CM]

From below occipital protuberance to center of anterior fontanelle.

2. SUB-OCCIPUTO FRONTAL DIAMETER [10 CM]

From below occipital protuberance to center of frontal suture.

3. OCCIPUTO FRONTAL DIAMETER [ 11.5 CM]

From occipital protuberance to glabella.

4. MENTO-VERTICLE DIAMETER [ 14 CM]

From chin to vertical point.

5. SUBMENTO VERTICAL DIAMETER [ 11.5 CM]

From junction of mouth and neck to highest point of vertex.

6. SUBMENTO BREGMATIC [ 9.5 CM]

From junction of neck and lower jaw to bregma.

PRESENTING DIAMETER OF FETAL HEAD

VERTEX PRESENTATION

* SOB & BP [ 9.5 cm]

BROW PRESENTATION

MV [14 cm] & BT [ 8.5 cm]

FACE PRESENTATION

SMB [9.5 cm] & BT [8.5 cm]

MOULDING “ It is reduction in the diameter of fetal skull which

encourage progress of delivery to rigid maternal pelvis without harming fetal brain.”

Skull bones are over ride each other and reduce head circumference.