hereditary attribute
Double eyelids have genetic properties. But genetic attributes also have the characteristics of dominant inheritance and recessive inheritance.
Appear in 5~6 months.
In most cases, the dominant inheritance of double eyelids is high, so the baby's double eyelids often appear slowly in 5~6 months.
Appears around 10 month.
However, some babies may gradually show the characteristics of double eyelids after nearly 10 months due to personal factors and other reasons.
Single and double eyelid phenomenon
Some babies also have single eyelids and double eyelids. That is, there are single eyelids and double eyelids.
Don't worry too much.
If this happens, parents need not worry too much. When the baby grows into a stable adult, if there is an urgent need for beauty, plastic surgery can also be done, or a single eyelid can be turned into a double eyelid.