It is not recommended for women who are pregnant or trying to become pregnant to take any medication that has not been prescribed by a doctor, as some over-the-counter drugs and supplements may pose serious risks to the unborn baby. Some medications can cross the placenta and have harmful effects on the developing fetus, while others may interact with hormones and interfere with fertility treatments. Additionally, it is important for pregnant women to be aware of potential drug interactions between their existing prescriptions and any additional medications they might consider taking. It is best for them to speak with their doctors before taking any new medicine or supplement during pregnancy.