Funding for this research was provided by:
Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01 HD084473-04)
Received: 24 January 2020
Accepted: 7 May 2021
First Online: 20 May 2021
: The authors declare that they have no conflict of interest.
: Data collection for the National Survey of Family Growth was approved by the NCHS Research Ethics Review Board. Analysis of de-identified data from the survey is exempt from the federal regulations for the protection of human research participants. Analysis of restricted data through the NCHS Research Data Center is also approved by the NCHS ERB.