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In its first three seasons, the league was divided into two Conferences that played a double round robin, with the winner of both contesting a final for the championship. The first season featured no relegation, from the 2010–11 season onwards, the last placed team in each conference got relegated.

Since 2012–13 the league is played in one group only. In 2015–16 two teams were relegated. The eight clubs who formed the League were Aberystwyth Town Ladies, Caernarfon Town Ladies, Llanidloes Ladies, Manorbier Ladies, Newcastle Emlyn Ladies, Swansea City Ladies, UWIC Ladies and Wrexham Women.

The league was increased to five teams per Conference in 2010–11, with Caerphilly Castle Ladies and Trefelin Ladies joining the South and Llandudno Junction Ladies joining the North. Manorbier Ladies ceased playing activities after their inaugural season.

Llandudno Junction's stay in the league lasted just one season before they were relegated; they were replaced by Northop Hall Girls.

In May 2021, the Football Association of Wales announced a restructuring of the league, including cutting the number of teams from nine to eight, splitting the second tier into northern and southern conferences, and the introduction of a U19 development league. The restructuring saw Abergavenny Women's FC, Caerphilly Castle Ladies and Briton Ferry Llansawel Ladies demoted to the second tier, while Barry Town United Ladies FC and The New Saints joined the Premier League. The choice of top-tier teams in the restructuring was met with a significant amount of criticism, as Abergavenny had finished within the top four during the 2020–21 season and The New Saints did not have a complete senior women's side. FAW head of women's football Lowri Roberts stood by their decision, adding that "we have to be able to compete with Tier 3 in England. The WSL and Championship in England are professional and semi-professional and we’re a long way off that. It’s unlikely we’ll get to a professional level."

Rebranding

In August 2021, the league also announced a rebranding initiative, changing the name from "Welsh Premier Women's League" to "Adran Premier", adopting the Welsh word adran (division). For sponsorship reasons it is named the "Genero Adran Premier" (sponsored by Welsh firm Genero). The second tier conferences were likewise renamed Adran North and Adran South. The rebranding was in part an effort to remove the word "Women's" from the league name to achieve better parity with the men's game. The league cup was likewise rebranded to the Adran Trophy.