Nausea and vomiting (Qay__ampersandsignrsquo;al-haml) are considered atypical and almost inevitable feature of pregnancy. Concern about the harmful effect of medication on the fetus may cause many women not to seek treatment or to try alternative therapies for nausea and vomiting. The only medicine that is FDA-approved for Nausea and vomiting in pregnancy is doxylamine__ampersandsignndash;pyridoxine combination; has reported side effects like somnolence, headache, dizziness, dry mouth, and hypersensitivity. According to Unani scholars, nausea and vomiting in pregnancy are mostly due to the accumulation of morbid material in the stomach. It is relatively uncommon in the male fetus. The objective of the study is to search classical literature of nausea and vomiting in pregnancy (Qay__ampersandsignrsquo;al-haml) and to correlate with modern literature. The classical Unani sources viz., Al-Qanun fi__ampersandsignrsquo;l Tibb (Canon of Medicine), Iksir-i-A__ampersandsignlsquo;zam, Al Hawi fi__ampersandsignrsquo;l Tibb (Continens Liber), Tarjuma Kamil al-Sana__ampersandsignlsquo;a al-Tibbiyya, Dhakhira Khawarizm Shahi, and Tibbi-Akbar were reviewed. Further, different search engines were also browsed on the website to explore recent studies. Various Unani drugs are mentioned for the treatment of qay__ampersandsignrsquo;al-haml including gulqand, sikanjabeen sada, sharbat anar sheerin, sikanjabeen lemooni, jawarish anarain, mastagi, ilaichi etc. In this literary research, an effort has been made to focus on the various causes, diagnosis and management of nausea and vomiting in pregnancy by Unani system of medicine. Some herbs and Unani compound formulations used in the treatment of qay__ampersandsignrsquo;al-haml have also been highlighted.