The main goal of this study is to validate the accuracy of the body position detection by non-invasive wearable monitors (Skiin garments, Myant Medical Corp) during sleep in pregnant participants. This is a first step towards examining the association between maternal sleep position and fetal growth.

Individuals who are eligible to the study and provided consent to participate will be asked to:

1. Wear the Skiin Garment system for the duration of their time in the hospital (minimum 1 nights until they are discharged from hospital).
2. Complete a study completion questionnaire about their experience with the device and the study.

The Skiin Garment system is composed by biosensing garments presented in different form factors (bra, chest band, or underwear). It captures physiological metrics and relay information from a pod to local hub with Bluetooth.

The true body position will be obtained using visual observations and cameras.

Inclusion Criteria:

• Assigned female at birth
• Currently pregnant
• Admission to MUMC Antenatal Clinic with anticipation of being admitted for greater than 24 hours
• Able and willing to provide informed consent to participate

Exclusion Criteria:

• Unestablished gestational dating (based on first-trimester ultrasound)
• Known maternal cardiac or pulmonary disorder
• Known sleep disorders (i.e., sleep apnea, periodic limb movement disorder, etc.)
• Known fetal chromosomal or structural abnormalities
• Known highly sensitive skin/skin sensitivities to textile electrodes

This study will enroll pregnant women.

Pregnant women admitted in the antenatal in-patient clinic at McMaster University Medical Centre for greater than 24 hours.