Feasibility Study: Continuous Fetal Monitoring During Maternal Exercise

Inclusion criteria

* Minimal age of 18 years old * Pregnant women with an uncomplicated singleton pregnancy and a gestational age between 30+0 and 40+0 weeks and days * Oral and written informed consent is obtained * Engage in aerobic exercise during pregnancy A potential subject who meets any of the following criteria will be excluded from participation in this study: * Insufficient knowledge of Dutch or English language * Women with a multiple pregnancy * Contra-indications for the Nemo Fetal Monitoring System (NFMS): * Fetal and/or maternal cardiac arrhythmias * Contraindications to abdominal placement (dermatologic diseases of the abdomen precluding preparation of the abdomen with abrasive paper) * Women connected to an external or implanted electrical stimulator, such as a pacemaker (because of disturbance of the electrophysiological signal) * Fetus with known congenital or chromosomal abnormalities * Women with absolute or relative contraindications to aerobic exercise during pregnancy at time of inclusions and during maternal exercise: * Mild or severe respiratory diseases (e.g. chronic obstructive pulmonary disease, restrictive lung disease and cystic fibrosis) * Mild or severe acquired or congenital heart disease with exercise intolerance * Uncontrolled or severe arrhythmia * Vasa previa * Type 1 diabetes * IUGR * Severe PE * Cervical insufficiency * Women with relative contraindications to aerobic exercise during pregnancy: * Mild respiratory disorders * Mild congenital or acquired heart disease * Well-controlled type 1 diabetes * Pre-eclampsia * Cervical insufficiency * Placenta previa * Untreated thyroid disease * Symptomatic, severe eating disorder * Multiple nutrient deficiencies and/or chronic undernutrition * Moderate-heavy smoking (\> 20 cigarettes per day)