This study will evaluate the physiological and pathophysiological determinants of pregnancy and feeding method on the maternal cardiovascular system. This includes non-invasive measurements.

Inclusion Criteria:

• Age between 20 and 40 years old
• Singleton pregnancy
• First pregnancy at the minimum age of 18 years
• In good health, especially no cardiovascular diseases, diabetes or a BMI > 30 kg/m2
• Capable in understanding properly the ICF and the investigators

Exclusion Criteria:

• On chronic medication, especially antihypertensive or antidiabetical drugs
• Multiple pregnancy
• First pregnancy before the age of 18 years old
• Smoking more than 10 cigarettes/day, drinking more than 3 units of alcohol/day or more than 5-6 units of caffeine-containing drinks
• The use of any extralegally drugs
• Not able to have reliable blood pressure or hemodynamic data at screening