FtM

1. alternativeAlternative form of FTM (“female-to-male (transgender)”).

1. abbreviationinitialismnot comparableInitialism of female-to-male (transgender or transsexual).

plural FTMs

1. A female-to-male person.

   At the end of the 1960s doctors at UCLA's Gender Identity Research Clinic debated privately whether FTMs even qualified as transsexuals.

   2013, Susan Stryker, Stephen Whittle, The Transgender Studies Reader, page 373

2. abbreviationAbbreviation of first-time mom/mother/mum.
3. abbreviationAbbreviation of full-time mom/mother/mum.

   I'm a full-time mommy. […] You know when […] two weeks into [a] new gig you realize you got stuck with the turd work no one else wanted, […]? […] Recruitment for Full-Time Mom (FTM) works much the same way, although the tactics are sneakier and subtler.

   2006 03, Jennifer Johnston, The Myth of The Bonbons: Exposing the Life of a Full-Time Mom, iUniverse, →ISBN

4. abbreviationinitialismInitialism of freedom to marry (marriage equality).

   […] I spotted an ad for “The Freedom to Marry Kit.” I wondered, “Who is Kit and why do we want to marry her?” The FTM kit is an actual kit designed to help concerned gays […]

   1998, Kate Clinton, Don't Get Me Started

   1 more example

   One such campaign – Freedom to Serve, Freedom to Marry – featured videos of LGB military service members and their families. Michael Crawford explains that FTM needed a way to demonstrate the discriminatory impact of the Defense of Marriage Act that excluded same-sex couples […]

   2018, Rhonda Gibson, Same-Sex Marriage and Social Media: How Online Networks Accelerated the Marriage Equality Movement, Routledge, →ISBN

1. abbreviationinitialismInitialism of for that matter.