Progesterone increases breast growth in trans women, study finds

Trans people who want larger breasts should start taking progesterone, according to the latest research into hormone therapy.

Dut researchers found that the feminising hormone, when taken as part of hormone replacement therapy (HRT), typically increases breast growth for trans people.

Progesterone is one of two key female sex hormones, the other being estradiol, better known as oestrogen.

Typically found in pill form, progesterone can be taken either orally or rectally, known as boofing .

While it tends to promote breast growth in cisgender women, there have been few studies on its safety and effectiveness for transgender women. The lack of reliable evidence means progesterone supplements are rarely prescribed to trans people.

To address this, a team at the Amsterdam University Medica