This is a prospective, two-arm, non-blinded randomized controlled study designed to evaluate the effects of a one-week alternate nostril breathing (ANB) intervention on nausea and vomiting severity in pregnant individuals during their first trimester.

Inclusion Criteria:

• Pregnant individuals aged 18 years or older
• Viable pregnancy with a gestational age between 6 0/7 - 12 6/7 weeks of gestation, confirmed by last menstrual period or ultrasound
• Diagnosed with mild to moderate NVP (PUQE-24 score between 4-12)
• Ability to understand and read English

Exclusion Criteria:

• Severe nausea and vomiting, defined as a PUQE score >12, or diagnosis of hyperemesis gravidarum requiring hospitalization or intravenous fluid therapy
• Pre-existing, active or acute respiratory conditions (e.g., asthma, COPD)
• History of severe anxiety disorders affecting breathing patterns
• Known deviated nasal septum
• Nausea and vomiting that pre-dates the pregnancy or is suspected to be due to a etiology other than pregnancy