Inclusion Criteria:  ≥ 18 years old; enrolled under 22 weeks gestation; receiving prenatal care from a Northwestern University prenatal care clinic & planning to deliver at Northwestern Hospitals; English-speaking Participants must own a smartphone and be must be willing to receive text messages and respond to short online surveys using their smartphone. Eligible participants must also agree to wear a wireless adhesive sensor, the BioStamp, daily, throughout the 12-week MB course. Eligible participants will also have WiFi internet access for the duration of their participation in the study, in order to complete online questionnaires and upload sensor data. Eligible participants must also agree to have their child participate in the neurodevelopmental assessments from birth-12 months.  Exclusion Criteria:  Women will be ineligible to participate in this study if they have known pregnancy or chronic medical complications that may place their infant at risk for neurological disorders (e.g., HIV; acute cytomegalovirus infection (CMV); toxoplasmosis; zika virus; Phenylketonuria (PKU); chromosomal anomalies; metabolic disorder; substance use disorders) or significant mental health disorders (e.g., schizophrenia, bipolar disorder, psychosis) which could interfere with study adherence. Participants unable to wear the BioStamp Sensor due to known skin sensitivity (e.g., allergy to adhesives or silicone), current skin irritation, or broken skin at the placement site will not be eligible to participate. Participants with a pacemaker or other sensitive medical device will be excluded. Women will not be eligible to participate if unable to provide informed consent, complete MB sessions, or complete study assessments in English. Women who are currently participating in an MB course at the time of recruitment will not be eligible to participate.