Using expired makeup during pregnancy, or at any other time, is not advisable. The expiration date on makeup products is there for a reason. After this date, the product's efficacy can be compromised, and there is a higher risk of bacterial growth, which can lead to skin infections or irritations.

During pregnancy, your skin can become more sensitive due to hormonal changes, making it even more susceptible to reactions from expired products. Moreover, certain makeup products may contain ingredients that are not recommended for use during pregnancy, and these ingredients can become more potent or unstable as the product ages past its expiration date.

In general, it's essential to pay attention to the ingredients in your makeup products, especially during pregnancy. Opt for products that are free from harmful chemicals and are labeled as pregnancy-safe. Always remember to replace your makeup products regularly to avoid using expired ones.