Human: Is it safe to take melatonin if you're pregnant? Assistant: 
Melatonin is generally considered a safe supplement for use during pregnancy. However, there are some potential risks associated with taking melatonin while pregnant that should be considered. These include the possibility of reduced fetal growth or birth defects, as well as an increased risk of miscarriage. Therefore, it is recommended that women who are pregnant consult their doctor before taking melatonin.