Slow and Deep Breathing to Lower Blood Pressure in Women With Pregnancy-induced Hypertension

Inclusion Criteria:

• Diagnosed with pregnancy-induced hypertension (PIH). Defined as "new hypertensionpresenting after 20 weeks of pregnancy without significant proteinuria (urinaryprotein:creatinine ratio greater than 30mg/mmol" by NICE guidelines (2010) ORdiagnosed as having one-off high blood pressure but at risk of developing PIH;

• Single pregnancy;

• Capable of giving informed consent;

• Age over 18.

Exclusion Criteria:

• Under 18 years old;

• Referred immediately to obstetric-care after PIH diagnosis for an immediateintervention, with systolic blood pressure over 160 mmHg or diastolic blood pressureover 100 mmHg;

• Multiple pregnancy (twins, triplets, etc.);

• Current smoker;

• Current diagnosis of respiratory diseases; asthma, COPD (Chronic ObstructivePulmonary disease), bronchitis. (A previous occurrence or diagnosis that has notbeen present for longer than 1 year ago does not exclude participants, i.e.childhood asthma);

• Allergy/reaction to gel used on ECG tabs;

• Vulnerable participants who are unable to give informed consent.