How is the fetus exposed to the factor?

The fetus is exposed to various factors primarily through the placenta, which acts as a barrier and conduit between the mother and the developing baby. Nutrients, oxygen, and various substances, including medications, toxins, and infections, can cross this barrier. Additionally, maternal blood circulation delivers these factors to the fetus, influencing its growth and development. Environmental factors, such as maternal diet and lifestyle choices, also play a significant role in fetal exposure.