The Scarlets welcomed the Blues U15's to Carmarthen Park with both sides realising the significance of the game.
Both sides had won their first games easily so this game was likely to be key at the end of the regional season.
The Scarlets started the strongest but some poor passing allowed the Blues into the game and they ended the first half the strongest with only committed try line defence led by Jodie Williams, Ffion Jones and Emily Coleman keeping out a strong Blues attack.
The second half started like the first with the Scarlets in control but after the break the Scarlets seemed to have a new resolve, and when the ball was moved quickly wide to Sioned Jones, she beat two defenders on the outside to score near the corner flag.
With the conversion attempt wide of the mark, the result was still in the balance and despite the Scarlets dominating possession the Blues backline looked dangerous every time they had the ball, but determined defence from the Scarlets stopped every attack from the Blues.
The last 10 minutes of the game was a battle of wills, but the Scarlets were determined after last season's 0-0 score line not to let their lead slip.
With Chloe Davies and Elisha Butchers winning the breakdown battle and no gaps in the Scarlets backline defence, the Blues had nothing left to offer, and the Scarlets held on for a deserved victory.
With only one try conceded in 10 regional games, the Scarlets defence proved to be rock solid.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series