The step lengthens as the pregnancy progresses due to weight gain and changes in posture. Both the length and height of the footstep shortens with PGP. Sometimes the foot can turn inwards due to the rotation of the hips when the pelvic joints are unstable. On average, a womans foot can grow by a half size or more during pregnancy. Pregnancy hormones that are released to adapt the bodily changes also remodel the ligaments in the foot. In addition, the increased body weight of pregnancy, fluid retention and weight gain lowers the arches, further adding to the foots length and width. There is an increase of load on the lateral side of the foot and the hind foot. These changes may also be responsible for the musculoskeletal complaints of lower limb pain in pregnant women. During the motion of walking, an upward movement of the pelvis, one side then the other, is required to let the leg follow through. The faster or longer each step the pelvis adjusts accordingly. The flexibility within the knees, ankles and hips are stabilized by the pelvis. Normal gait tends to minimize displacement of centre of gravity whereas abnormal gait through pelvic instability tends to amplify displacement. During pregnancy there may be an increased demand placed on hip abductor, hip extensor, and ankle plantar flexor muscles during walking. To avoid pain on weight bearing structures a very short stance phase and limp occurs on the injured side(s), this is called Antalgic Gait.
Pain may also be present when lifting, carrying, pushing or pulling. The symptoms (and their severity) experienced by women with PGP vary, but include:

Present swelling and/or inflammation over joint. Difficulty lifting leg. Pain pulling legs apart. Inability to stand on one leg. Inability to transfer weight through pelvis and legs. Pain in hips and/or restriction of hip movement. Transferred nerve pain down leg. Can be associated with bladder and/or bowel dysfunction. A feeling of the symphysis pubis giving way. Stooped back when standing. Malalignment of pelvic and/or back joints. Struggle to sit or stand. Pain may also radiate down the inner thighs. Waddling or shuffling gait. Audible clicking sound coming from the pelvis. Severity
The severity and instability of the pelvis can be measured on a three level scale. Pelvic type 1:The pelvic ligaments support the pelvis sufficiently. Even when the
muscles are used incorrectly, no complaints will occur when performing everyday activities. This is the most common situation in persons who have never been pregnant, who have never been in an accident, and who are not hypermobile. Pelvic type 2:The ligaments alone do not support the joint sufficiently. A
coordinated use of muscles around the joint will compensate for ligament weakness. In case the muscles around the joint do not function, the patient will experience pain and weakness when performing everyday activities. This type often occurs after giving birth to a child weighing 3000 grams or more, in cases of hypermobility, and sometimes after an accident involving the pelvis.