PRenatal Video-Based Education and PostPARtum Effects

Number of Participants Exclusively Breastfeeding During Postpartum Hospitalization

This variable was derived from the infant's feeding documentation via Electronic Medical Record. Responses for Breastfeeding Exclusivity were categorized as YES if the infant had been fed only their mother's own breast milk. Responses were categorized as NO if they had received anything other than only their mother's own breast milk (e.g., formula + their own milk, formula only).

Time frame: Postpartum hospitalization (0-4 days postpartum)

Number of Participants Exclusively Breastfeeding at 2 Weeks Postpartum

This variable derived from participant self-report survey emailed at 2 weeks postpartum. Responses for Breastfeeding Exclusivity were categorized as YES if the infant had been fed only their mother's own breast milk. Responses were categorized as NO if they had received anything other than only their mother's own breast milk (e.g., formula + their own milk, formula only).

Time frame: 2 weeks postpartum

Number of Participants Exclusively Breastfeeding at 6 Weeks Postpartum

This variable derived from participant self-report survey emailed at 6 weeks postpartum. Responses for Breastfeeding Exclusivity were categorized as YES if the infant had been fed only their mother's own breast milk. Responses were categorized as NO if they had received anything other than only their mother's own breast milk (e.g., formula + their own milk, formula only).

Time frame: 6 weeks postpartum

Number of Participants Exclusively Breastfeeding at 12 Weeks Postpartum

This variable derived from participant self-report survey emailed at 12 weeks postpartum. Responses for Breastfeeding Exclusivity were categorized as YES if the infant had been fed only their mother's own breast milk. Responses were categorized as NO if they had received anything other than only their mother's own breast milk (e.g., formula + their own milk, formula only).

Time frame: 12 weeks postpartum

Number of Participants Exclusively Breastfeeding at 6 Months Postpartum

This variable derived from participant self-report survey emailed at 6 months postpartum. Responses for Breastfeeding Exclusivity were categorized as YES if the infant had been fed only their mother's own breast milk. Responses were categorized as NO if they had received anything other than only their mother's own breast milk (e.g., formula + their own milk, formula only).

Time frame: 6 months postpartum

Breastfeeding Exclusivity (Categorical)

Categorical outcome indicating proportional range of breast milk feeds during postpartum/birth hospitalization (0-4 days postpartum)

Time frame: 0-4 days postpartum

Breastfeeding Exclusivity (Categorical)

Categorical outcome indicating proportional range of breast milk feeds since infant was born

Time frame: 2 weeks

Breastfeeding Exclusivity (Categorical)

Categorical outcome indicating proportional range of breast milk feeds in past week

Time frame: 6 weeks postpartum

Breastfeeding Exclusivity (Categorical)

Categorical outcome indicating proportional range of breast milk feeds in past week

Time frame: 12 weeks postpartum

Breastfeeding Exclusivity (Categorical)

Categorical outcome indicating proportional range of breast milk feeds in past week

Time frame: 6 months postpartum

Breastfeeding Self-efficacy

Scores on Breastfeeding Self-Efficacy Scale-SF(score range 14-70, with higher score represents better outcome)

Time frame: 6 weeks postpartrum

Breastfeeding Self-efficacy

Scores on Breastfeeding Self-Efficacy Scale-SF(score range 14-70, with higher score represents better outcome)

Time frame: 12 weeks postpartum

Number of Participants Breastfeeding at Postpartum Hospitalization (0-4 Days Postpartum)

This variable was derived from the infant's feeding documentation via Electronic Medical Record. Responses were categorized as YES for Breastfeeding Duration if they answered that they were still feeding their own breast milk to their infant at each respective timepoint. Please note that responses were still classified as a YES if they were combination feeding (e.g., using their own breast milk along with formula, solids, etc.). Responses were categorized as NO if they had ceased to provide any of their own breast milk to their infant.

Time frame: Postpartum hospitalization (0-4 days postpartum)

Number of Participants Breastfeeding at 2 Weeks Postpartum

Participants were asked what their infant was currently being fed. Responses were categorized as YES for Breastfeeding Duration if they answered that they were still feeding their own breast milk to their infant at each respective timepoint. Please note that responses were still classified as a YES if they were combination feeding (e.g., using their own breast milk along with formula, solids, etc.). Responses were categorized as NO if they had ceased to provide any of their own breast milk to their infant.

Time frame: 2 weeks postpartum

Number of Participants Breastfeeding at 6 Weeks Postpartum

Participants were asked what their infant was currently being fed. Responses were categorized as YES for Breastfeeding Duration if they answered that they were still feeding their own breast milk to their infant at each respective timepoint. Please note that responses were still classified as a YES if they were combination feeding (e.g., using their own breast milk along with formula, solids, etc.). Responses were categorized as NO if they had ceased to provide any of their own breast milk to their infant.

Time frame: 6 weeks postpartum

Number of Participants Breastfeeding at 12 Weeks Postpartum

Participants were asked what their infant was currently being fed. Responses were categorized as YES for Breastfeeding Duration if they answered that they were still feeding their own breast milk to their infant at each respective timepoint. Please note that responses were still classified as a YES if they were combination feeding (e.g., using their own breast milk along with formula, solids, etc.). Responses were categorized as NO if they had ceased to provide any of their own breast milk to their infant.

Time frame: 12 weeks postpartum

Number of Participants Breastfeeding at 6 Months Postpartum

Participants were asked what their infant was currently being fed. Responses were categorized as YES for Breastfeeding Duration if they answered that they were still feeding their own breast milk to their infant at each respective timepoint. Please note that responses were still classified as a YES if they were combination feeding (e.g., using their own breast milk along with formula, solids, etc.). Responses were categorized as NO if they had ceased to provide any of their own breast milk to their infant.

Time frame: 6 months postpartum

Number of Participants Breastfeeding at 12 Months Postpartum

Participants were asked what their infant was currently being fed. Responses were categorized as YES for Breastfeeding Duration if they answered that they were still feeding their own breast milk to their infant at each respective timepoint. Please note that responses were still classified as a YES if they were combination feeding (e.g., using their own breast milk along with formula, solids, etc.). Responses were categorized as NO if they had ceased to provide any of their own breast milk to their infant.

Time frame: 12 months postpartum

Onset of Lactogenesis II

Recall of lactogenesis II in post-birth days

Time frame: 2 weeks postpartum

Perceived Milk Supply (Continuous)

Score on PIBBS subscale of H \& H Lactation Scale measuring perceived infant satisfaction with breast milk received (score range: 5-35, higher score is better outcome)

Time frame: 2 weeks postpartum

Perceived Milk Supply (Continuous)

Score on PIBBS subscale of H \& H Lactation Scale measuring perceived infant satisfaction with breast milk received (score range: 5-35, higher score is better outcome)

Time frame: 6 weeks postpartum

Perceived Milk Supply (Continuous)

Score on PIBBS subscale of H \& H Lactation Scale measuring perceived infant satisfaction with breast milk received (score range: 5-35, higher score is better outcome)

Time frame: 12 weeks postpartum

Perceived Milk Supply (Dichotomous)

Endorsement of insufficient milk supply via investigator created item (dichotomous outcome)

Time frame: 2 weeks postpartum

Perceived Milk Supply (Dichotomous)

Endorsement of insufficient milk supply via investigator created item (dichotomous outcome)

Time frame: 6 weeks postpartum

Perceived Milk Supply (Dichotomous)

Endorsement of insufficient milk supply via investigator created item (dichotomous outcome)

Time frame: 12 weeks postpartum

Number of Participants Commenting on the Impact/Integration of AME During Pregnancy and Utilization of Antenatally Collected Milk During the Postpartum Period

A subset of participants took place in a qualitative assessment via semi-structured interview. Numbers below represent the number of participants who endorsed each of the following categories during their interview: 1) discussing the impact of the study on their pregnancy/postpartum experience, 2) integration of AME into their daily life, and 3) utilization of antenatal milk during the postpartum period

Time frame: 6 weeks postpartum