This document describes the progression of weight bearing, posture, and antigravity movement in infants from birth to 12 months. It outlines the physical development in 3 month intervals, including how weight is distributed, typical postures assumed, and new motor abilities like head control, sitting, crawling, and standing with support. The development follows a pattern from total dependence to increasing independence and mobility over the first year.

2. From: Birth to 1 month
Weight Bearing: -
-Weight on buttocks and
legs.
Posture:- Hip flexion
-Trunk flexion
Antigravity Movement:
--Lifts and maintains
head in midline briefly.
-Upper cervical spine
extension.

3. From: 2.5 to 4 months
Weight Bearing:
- Weight on buttocks,
legs ,and hands.
Posture:-Head up; shoulders
elevated
- Hips flexed , externally
rotated , and abducted.
-Knees flexed.
-Lumbar and thoracic spine
rounded.
Antigravity Movement:
-Maintains head in midline .
-Supports weight on arms
briefly.

4. From: 3 to 5 months
Weight Bearing:
-Weight on buttocks and
lumbar spine.
Posture:-Arms flexed
-Hips and knees
flexed.
-Feet may be off
surface.
Antigravity Movements:
-Chin tucked; head in line
or in front of body.
-May assist movement with
abdominal muscles and
arms flexion.

5. From: 4 to 6 months
Weight Bearing:
-Weight on buttocks and legs.
Posture :-Head in midline .
-Shoulders in
front of hips.
-Thoracic spine
extended.
-lumbar flexion.
-Hips flexed and
externally rotated.
Antigravity Movement:
-Head extension.
-Scapular adduction and
humeral extension.
-Can’t maintain position
indefinitely.

6. From: 4.5 to 6 months
Weight Bearing:
-Weight on buttocks,
legs ,and hands.
Posture: - Head up
-Lumbar spine
rounded, thoracic spine
extended.
-Extended arm
support.
-Hips flexed , externally
rotated, and abducted.
Knees flexed
Antigravity Movement:
-Head movements free from
trunk
propped an extended arms
cannot move in and out of position.

7. From: 5 to 7 months
Weigh Bearing:-
-Weight on buttocks and legs
Posture:-
-Elbow flexed
- Thoracic spine extended
-Hips flexed, externally
rotated , and abducted with
wide base of support
-knees flexed.
Antigravity Movement:-
-Cannot be left alone in
- sitting position indefinitely.

8. From: 5.5 to 8 months
Weight Bearing:
-Weight on buttocks and
legs.
Posture: -Shoulder aligned
over hips.
-Arms free.
-Wide base of support.
Antigravity Movements:
-Arms move away
from body.
-Can play with a toy.
-Can be left alone in
sitting position.

9. From: 6 to 8 months
Weight Bearing:
-Weight on buttocks
and legs.
Posture: -Trunk rotated
-Elongation of trunk
on reaching side.
Antigravity Movement:
-Sits independently.
-Reaches for toy with trunk
rotation.

10. From: 7 to 8 months
Weight Bearing:
-Weight on hands , forearms ,and
trunk.
Posture:-Trunk flexed anteriorly or
sideways over lower extremities.
- Legs flexed , abducted
and externally rotated .
Antigravity Movements:
-Moves out of sitting
position to achieve prone lying
position.
-Pulls with arms; legs
inactive.

11. From: 8 to 10 months
Weight Bearing:
-Weight on both hands &
one foot.
Posture:
-Moves from an
independently sitting
position to four-point
kneeling.
Antigravity Movement:
-Actively lifts
pelvis,buttocks,and un
weighted leg to assume
four-point kneeling
position

12. From: 9 to 12 months
Weight Bearing:
-Weight on bullocks.
Posture:
-Variety of postures with
dissociation of legs
Narrow base of support.
Antigravity Movement:
-Position of legs varies
infant moves in and out
of positions easily.