Hair colouring during pregnancy is an issue that expectant mothers frequently encounter and think about. The possible effects of the chemicals contained in hair colours on mother and baby lead many women to be more cautious during this period. There are some important rules to be considered when colouring hair during pregnancy. When these rules are not followed, it is thought that chemicals may have negative effects on the development of the baby due to the risk of chemicals passing through the body of the expectant mother to the baby.

The first three months are the most critical period in terms of the baby's organ development, so it is recommended to avoid hair colouring during this period. If hair colouring is to be done, ammonia-free and vegetable dyes should be preferred because such dyes contain less toxic substances. It is also important that the hair dye is not applied to the scalp or that the dyeing time is kept to a minimum so that the hair dye does not come into contact with the scalp as much as possible. Painting should be done in a well-ventilated area and protective equipment such as gloves should be used. These measures help to protect the health of both mother and baby by reducing inhalation and absorption of chemicals through the skin.

If all these rules are not observed, there is a possibility that the chemicals in the hair dye can enter the mother's bloodstream and thus reach the baby through the placenta. This can lead to developmental disorders or other health problems, especially in the early stages when the development of the foetus is sensitive. Therefore, it is of great importance to consult a doctor and take the necessary precautions before deciding on hair colouring in order to ensure that the baby has a healthy development process.