There is limited research on the use of melatonin during pregnancy, and it is not known if it is safe for use in pregnant women. Some animal studies have suggested that high doses of melatonin may be harmful to the developing fetus, but more research is needed to confirm these findings in humans.
The American College of Obstetricians and Gynecologists (ACOG) does not recommend the use of melatonin during pregnancy. ACOG advises pregnant women to avoid using any supplements or herbs unless they are specifically recommended by a healthcare professional.
If you are pregnant and having difficulty sleeping, it is a good idea to speak with a healthcare professional. They can help you determine the cause of your sleep problems and recommend appropriate treatment options. In some cases, lifestyle changes, such as establishing a regular sleep schedule and creating a relaxing bedtime routine, may be enough to improve your sleep.