How long will it take for baby's eyelids to get better?

For new parents, they all hope that their baby will have a beautiful face after being born, especially a pair of bright eyes. From a biological point of view, if both the husband and wife have double eyelids, then the baby's double eyelids are definitely dominant. However, since the eyes of newborns will be swollen for a period of time, even double eyelids will not be visible immediately. So, when will the baby's thick eyelids get better?

Relevant experts indicate that if one or both of a child's parents have double eyelids, then the child's double eyelids may not appear until a few months, a few years or even longer.

1. If one parent has double eyelids and the other has single eyelids, can they give birth to a son with single eyelids?

From a genetic point of view, double eyelids are dominant genes, while single eyelids are recessive genes. The gene issue cannot be changed by anything. As a dominant genetic factor, if one parent has double eyelids and the other has single eyelids, it can be reflected in the baby's appearance. If we assume that the letters A and a represent the genetic factors for double eyelids and single eyelids respectively, then the specific analysis is as follows:

AA+aa, then the child's gene expression is 100% Aa, and the baby will definitely have double eyelids;

Aa+aa, that is, the one with double eyelids carries the recessive gene for single eyelids, and the baby's gene may also be Aa or aa, so the baby may have double eyelids or single eyelids.

2. Why do babies sometimes have single eyelids and sometimes double eyelids?

Many mothers have found that sometimes their babies have double eyelids but become single eyelids after waking up from a nap. Sometimes, the baby has single eyelids, but after waking up from a nap, one of their eyes becomes double eyelids. Many mothers have this doubt in their hearts. They can't tell why the eyelids keep changing. In fact, changes in the baby's eyelids are also related to poor sleep and illness. Moreover, the "lifting facial muscles" on the eyes and eyelids will gradually become developed with the development of the baby's muscles and bones. If the baby carries a dominant gene, it will slowly turn back into double eyelids. Whether the eyelids are single or double is determined by genes, so mothers don’t need to worry.

If one of the spouses has double eyelids, then parents don’t need to worry, as the baby’s double eyelids will gradually appear as the baby grows and develops. At what age did your baby start to have double eyelids?