It is generally not recommended to have eyelash extensions during pregnancy. Here are the reasons:

- Allergic Reactions: The glue used in eyelash extensions often contains various chemical substances such as formaldehyde and cyanoacrylate. Pregnant women's bodies are more sensitive during pregnancy, and they are more likely to have allergic reactions to these substances. Allergic symptoms may include redness, itching, swelling of the eyes, and even eye infections, which can affect the health of pregnant women and the development of the fetus.
- Infection Risk: During the process of eyelash extensions, if the tools are not properly sterilized or the operation is not carried out in a hygienic environment, it is easy to cause bacterial or fungal infections. Eye infections can not only cause discomfort such as pain and inflammation in the eyes but may also require the use of medications for treatment, which may have potential impacts on the fetus.
- Hormonal Changes: During pregnancy, hormonal changes in the body can lead to changes in the condition of the skin and hair. Eyelashes may become more brittle and prone to fall out. Applying eyelash extensions in this situation may put additional stress on the natural eyelashes, resulting in more eyelash loss and affecting the health of the eyelashes after pregnancy.
- Emotional Stress: Pregnancy is a special period when pregnant women are often more emotionally sensitive and stressed. The process of getting eyelash extensions may cause some psychological pressure, worrying about whether it will affect the health of themselves and the fetus. This unnecessary stress is not conducive to the physical and mental health of pregnant women and the development of the fetus.
In conclusion, for the health of themselves and the fetus, it is best for pregnant women to avoid having eyelash extensions and choose some safer and more natural ways to take care of their eyes and enhance their appearance.