20 WEEKS
The Fetus Head Is Exposed
In Front Of Pelvis
It Is
IMPOSSIBLE
To Prevent Crushing The Baby
By Wearing The Belt Low
36 WEEKS
The Fetus Body Is
Totally Exposed
In Front Of Pelvis
Adapted From Growing Uterus Charts
Copyright: 2012 Childbirth Connection
With Permission
Adapted From Growing Uterus Charts
Copyright: 2012 Childbirth Connection
With Permission
At 36 Weeks
Frequently, the belt is located
above the pelvic crests. In these
cases the pelvis submarines
under the belt, which allows the
belt to crush the fetus all the
way back against the lower
spine.
Counter
At 20 weeks
The lap belt penetrates directly
into the top of the uterus, where
the placenta is normally located.
Placental abruption is the most
frequently cited cause of
traumatic fetal death

If the belt could be positioned
lower as is recommended by
NHTSA, the belt would
penetrate below the pelvic
crests and crush the fetus even
farther back against the rigid
pelvis and spine
.
Normal
Belt
Penetration