Inclusion Criteria:  Healthy subjects Subjects who are in their 2nd trimester of pregnancy Subject must be 18-60 years of age Subject must be able to consent to the procedure. Subject must fast (no solid food) for at least 8 hours and have no liquids within 2 hours prior to the procedure.  Exclusion Criteria:  Subjects with a history of upper respiratory disease or surgery Pregnant women with high-risk pregnancies such as history of: hyperemesis gravidarum, HIV, severe anemia or any other high-risk pregnancy conditions at the discretion of the subject's physician and the PI Subjects with a history of upper gastrointestinal surgery Pregnant women with Type 1 diabetes Pregnant women with Type 2 diabetes on medication and gestational diabetes requiring medication Pregnant women with gestational thrombocytopenia Subjects with upper respiratory infection at least 7 days prior to the procedure Subjects with any contraindications to the placement of the NJ tube including deviated septum or any other anatomical abnormalities of the nasopharynx or upper gastrointestinal region, history of trans-sphenoidal surgery, facial or cranial trauma and fractures, chronic sinusitis, esophageal strictures, varices etc. Subjects on medications that delay gastric emptying. Patients on drugs which impair clotting like anticoagulants and antiplatelet drugs, NSAIDS, history of bleeding disorders. Subjects using nasal steroids or any steroids for environmental allergies.