Because of postconception bleeding or menstrual irregularities, the presumed date of LMP may be in error. 1995, National Center for Health Statistics, “Technical Appendix”, in Vital Statistics of the United States, 1992, volume 1, Washington, DC, published 1996, →ISBN, DHHS Publication No. (PHS) 96-1100, page 9:
(abbreviation, alt-of, initialism) Initialism of lighting management plan.