ACOG Practice Bulletin: Emergency contraception, Number 152. September 2015.
ACOG Practice Bulletin: Benefits and risks of sterilization, Number 133. February 2013. Reaffirmed 2015.
ACOG Practice Bulletin: Long-acting reversible contraception: implants and intrauterine devices, Number 121. July 2011. Reaffirmed 2015.
ACOG Practice Bulletin: Noncontraceptive uses of hormonal contraception, Number 110. January 2004. Reaffirmed 2014.
Lockwood C. Guidelines for Perinatal Care. 7th ed. AAP and ACOG. 2012.