Pubic symphysis

Symphysis pubica

SkeletalSkeletonPelvis

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What it is
Fibrocartilaginous disc joining the two pubic bones in the midline.
Function
Allows slight movement and absorbs stress in the pelvic ring.
Size
≈ 4 cm tall, 4 mm wide
Clinical note
Pregnancy hormones (relaxin) loosen it, widening the pelvis slightly for childbirth.