Inclusion criteria:
Iranian nationality
gestational age 30 weeks or later
score more than 5 on the sleep quality questionnaire
having minimal literacy
having written informed consent
Exclusion criteria:
absence of pulmonary and respiratory problems such as asthma and migraine
not using herbal medicines that affect sleep quality
No neurological/psychiatric disorders, no use of narcotics, no use of other sleeping pills, no high-risk pregnancy (such as preeclampsia, diabetes, history of bleeding, placenta previa, etc.), no smell problems
no use of narcotics
no use of other sleeping pills
no high-risk pregnancy (such as preeclampsia, diabetes, history of bleeding, placenta previa, etc.)
no smell problems