Two months old baby can't straighten his legs

When babies are just born, parents often pay attention to some of their physical conditions, because some babies with congenital diseases will show physical diseases when they are just born. As the baby grows older, the various functions of the body begin to develop gradually. However, some parents find that their baby is two months old, but his legs are still in a state of being unable to straighten. Is this a normal phenomenon?

1How many months does it take for a baby to straighten his legs?

Infants are children under 1 year old. Babies grow and develop particularly rapidly at this stage, which is the most rapid growth and development stage in a person's life.

The baby's brain is still in a period of rapid development for a period of time after birth. The number of brain nerve cells continues to increase, and it needs sufficient, balanced and reasonable support of nutrients (especially high-quality protein), so the demand for calories, protein and other nutrients is particularly strong.

It is a natural physiological phenomenon for babies' legs to bend inward. This is mainly because the baby's body is in a flexed state in the mother's womb, so that the calves appear a little bent for a period of time after birth. In addition, judging from the baby's body proportions, his head is big, his upper body is longer than his legs, and his calves look short and bent.

The fetus' legs are curled in the mother's womb, and they remain curled for a while after birth. If a newborn baby's legs are straight, it is considered abnormal. This usually changes gradually after three months. This is the rule, it cannot be changed and there is no need to change it.

Generally, babies' calves can be straightened after two or three months, but their calves are still relatively bent. Only after they learn to walk will they gradually straighten, and not until they are three or four years old will they become like normal people.

After reading the above introduction, everyone should understand that the legs of a baby are bent when it is born. Generally, when the baby is about 2 to 3 months old, the baby's legs will slowly begin to straighten. When parents see their child's legs are bent, they must not be anxious. This is normal for babies less than 3 months old.

2What are the causes of newborns' inability to straighten their legs?

Generally speaking, it is normal for young babies to have bent calves. Because the muscles attached to the long bone on the inside of his calf (tibia) are thinner than those on the outside, the baby's calves appear a little bent, which is actually an illusion. The fetus also has inward-turned toes, which is caused by the fetus being cuddled in the mother's womb for a long time. After the baby is born, his limbs will slowly "stretch out", but some babies are slow to "stretch". When they learn to walk, their toes will bend inward and they will walk unsteadily. At around 1 year old, their legs will be slightly bent, and X-rays will also show bent calf bones, but there are no X-ray manifestations of rickets. This is because the children at this age have just started to walk, and their legs cannot bear their own body weight well, so their calves are temporarily bent. Generally, they will return to normal by the age of 2-3, and X-rays also show that the original bending of the calf bones has been corrected. Both situations are normal. For babies with introversion, the soles of their feet will tilt inward, but there will be basically no problems with their feet and knees. Babies with "duck feet" are less stable when learning to walk and are more likely to fall. If the baby's condition has not improved after the age of 2, the doctor may put a splint on the baby's foot and use a limb brace to correct the foot position, which may take a year. If the condition has not improved by the age of five or six, the doctor will consider performing surgery to loosen the muscles in the child's feet.

The so-called abnormal means that the baby suffers from severe rickets. Due to calcium deficiency, the bones become thin and softened. When the child stands or walks, the lower limbs cannot bear weight and the calves become bent. This is what we call "O"-shaped legs and "X"-shaped legs. For children with "O"-shaped legs, the curvature of their legs is more serious than normal. During the examination, the two ankle joints are brought together, and the two knee joints are often separated and cannot be brought together, with a gap of more than 3cm between the two knees. In "X"-shaped legs, the knees are close together but the ankles are not, and the distance between the two ankles is more than 3cm. The X-ray shows not only bent calf bones, but also other characteristic manifestations of rickets.