| Gestational age at delivery (weeks) | 38 (37, 39) |
| Female sex | 41 (40.2) |
| Male sex | 61 (59.8) |
| Birth weight (grams) | 2958 (2724, 3240) |
| SGA (BW ≤ 10%) | 10 (9.8) |
| Inborn | 99 (97) |
| Infants discharged to non-maternal guardianship | 18 (17.6) |
| Maternal Demographics | n (%) or median (Q1, Q3) |
| Maternal age (years) | 31 (28, 34) |
| COVID-19 tested | 54 (52.9) |
| COVID-19 positive | 1 (1) |
| Caucasian/White | 69 (67.6) |
| African American/Black | 3 (2.9) |
| American Indian/Alaskan Native | 2 (2) |
| Other/Unknown | 26 (25.5) |
| Primigravida | 10 (9.8) |
| Mothers receiving medication-assisted treatment | 79 (77.5) |
| Mode of Delivery | n (%) |
| Vaginal | 65 (63.7) |
| Cesarean section | 37 (36.3) |
| Breastfeeding | n (%) |
| Maternal milk eligible | 65 (63.7) |
| Any maternal milk provided | 57 (55.9) |
| Breastfeeding attempted | 46 (45.1) |
| Breastfeeding at discharge | 37 (36.3) |
| Prenatal Exposures | n (%) |
| Opioids alone | 21 (20.6) |
| Polysubstance (opioids + ≥ 1 nonopioid) | 81 (79.4) |