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Posted on 18th Jun 2010 @ 12:09 AM

It is very important of needs of special shoes for pregnant women during pregnancy, especially in the late three months of pregnancy.
Under normal conditions, the size and shape of human feet will be a little bit different more or less in the day. And this change was considered acceptable in the human foot soft tissue (softtissue), and that this variation is in the tolerable range (tolerableallowance). However, the tolerable range is related with the time of tolerable. Simply, the shorter of the time, the larger of tolerable range, and the longer of the time, the less of tolerable range.

Therefore, at the average time of day under the condition of wearing shoes (8hours), slightly fat foot circumference or degree (fittings) for the best tolerable range is 3-5mm.
Pregnant women's feet is a more complex situation. There are many physiological changes, the foot circumference change (swelling) in the day is 10-25mm which is the amount far exceeds the tolerable range of human feet. The changes of feet in pregnant women is only limited to foot circumference (fat degree) changes. The change of leg length is as the change of weight (ie sitting, walking standing, and posture), the average change in sitting and standing is about 4-7mm. And the average variation of standing and walking posture is about 3-6mm.
So selecting shoe's size for pregnant women should pay attention to the following principles:
(1) The shoe size (size) is determined by foot length. But we must pay attention to sitting, standing and walking posture of extending the amount of feet long is about more than 10mm.
(2) a wide degree of choice is the round and fat shoe with soft upper material.
(3) Choose the shoes with a upper open style, which means that it is better to choose socks style (lace-up) or the magic adhesive belt (velcro) for pregnant women. Or you can choose the width of elastic or adjustable footwear styles.
(4) During pregnancies, it is suitable for pregnant women to choose different shoes at early stage (0-6 months) and late stage (6-10 months). shoes for pregnant women during late stage of pregnancies should select a heel coaster (heel cup) of the guaranteed unit.
(5) It is necessary to pay attention to height of shoes heel when purchase for pregnant women, the ideal heel height is: 15-30mm. Although the flat heel shoes is acceptable for pregnant women, along with the effects of the "weight gain" and "feet backward move", it is tend to bring in the post-heel plantar fascia and other parts of the discomfort.
(6) Finally, choose shoes with a large sole which with good abrasion resistance and better slip resistance (such as dual-density PU material).