那時是用Beco 雙子星, 現在是用Beco 太陽星
一直都是上圖的坐姿
The IHDI recommends healthy hip positioning for all babies to encourage normal hip development. Within the womb, a baby spends a long time tucked in the fetal position, in which both hips and knees are bent or flexed. Baby in normal (fetal) womb position. After birth, it takes several months for the joints to stretch out naturally. Babies that have been in the breech (bottom first) position may need even more time to stretch out naturally. The hip joint is a ball and socket joint. During the first few months of life the ball is more likely to be loose within the socket because babies are naturally flexible and because the edges of the socket are made of soft cartilage like the cartilage in the ear. If the hips are forced into a stretched-out position too early, the ball is at risk of permanently deforming the edges of the cup shaped socket (hip dysplasia) or gradually slipping out of the socket altogether (hip dislocation). Hip dysplasia or dislocation in babies is not painful so this may go undetected until walking age and may also result in painful arthritis during adulthood. The risk of hip dysplasia or dislocation is greatest in the first few months of life. By six months of age, most babies have nearly doubled in size, the hips are more developed and the ligaments are stronger, so are less susceptible to developing hip dysplasia.
The most unhealthy position for the hips during infancy is when the legs are held in extension with the hips and knees straight and the legs brought together, which is the opposite of the fetal position. The risk to the hips is greater when this unhealthy position is maintained for a long time. Healthy hip positioning avoids positions that may cause or contribute to development of hip dysplasia or dislocation. The healthiest position for the hips is for the hips to fall or spread (naturally) apart to the side, with the thighs supported and the hips and knees bent. This position has been called the jockey position, straddle position, frog position, spread-squat position or human position. Free movement of the hips without forcing them together promotes natural hip development
- See more at: http://hipdysplasia.org/developmental-dysplasia-of-the-hip/prevention/baby-carriers-seats-and-other-equipment/#sthash.1SqxJVZC.dpuf
事實上是小寶寶這樣坐姿比較危險
大寶寶因為關節發育稍好反而還沒那麼危險
另外如果是開腿坐導致Hip Dysplaysia的話
那麼為什麼我查資料看到所有嬰兒用矯正Hip Dysplaysia/Hip Dislocation 的器材全部都是把腿固定在開腿坐?
