Scotland secure historic seventh Test win in a row
Coreen Grant and Rhona Lloyd with tries for Scots; Helen Nelson kicks 10 points
Sisilia Tuipulotu and Alex Callender tries along with eight points from Keira Bevan not enough for Wales as Lleucu George misses key conversion
Wales travel to England next weekend; Scotland host France
Wales 13-20 Scotland
Wales know they need a converted try just to draw level.
Time ticking away.
This would be a major blow for Wales to lose the opening game on home soil.
Scotland are eying an historic seventh Test win in a row - and a first in Cardiff.
Wales 13-20 Scotland
Scrum-half Sian Jones on for the last few minutes.
Chloe Rollie on for Scotland... she's a match winner.
Wales 13-20 Scotland
Heather Lockhart
Former Scotland prop on BBC Two
They've tried all the various others options and I understand what they're trying to do.
Their last six matches have all been bonus points wins but we said kicking would be key and decide the match and it's the right option to go for the points.
Helen Nelson
Oh the scrum went down and this time Scotland do get a penalty!
Nelson has ice in her veins and slots the three points.
That could be crucial.
Wales 13-17 Scotland
Alex Callender looked like she deliberately blocked that pass but instead it's just given as a knock-on. Could have been a penalty.
Wales 13-17 Scotland
We're into the last ten minutes and it's so tight... which way will this go?
Thumbs up for the hosts... down for Scotland.
Wales 13-17 Scotland
Heather Lockhart
Former Scotland prop on BBC Two
Amazing 126 tackles each, outstanding from both sides, only four missed from Scotland.
Wales 13-17 Scotland
Sisilia Tuipulotu scores try from close range to bring the score to 13-17 to Scotland.
Wales 13-17 Scotland
Hooker Carys Phillips and prop Donna Rose are on for Wales.
Louise McMillan on for Sarah Bonar who looks like she has damaged her left shoulder. She looks in pain.
Wales 13-17 Scotland
Women's Six Nations: Scotland's Rhona Lloyd scores try against Wales
Wales 13-17 Scotland
Chris Horsman
Former Wales coach on BBC Radio Wales
Wales are doing really well here, they're not overcommitting and that's allowing them to put pressure on with line speed.
Wales 13-17 Scotland
The home crowd are doing their best to inspire their team to hold firm.
They're managing so far. It's relentless from Scotland but those last two metres are proving the hardest.
Wales 13-17 Scotland
Scottish lineout, same corner, take three!
Wales 13-17 Scotland
Wales stand firm on their try line and hold out.
But it's another penalty and now it's Wales captain Hannah Jones being warned by the referee.
Wales 13-17 Scotland
Wales centre Kerin Lake just managed to cling onto Coreen Grant as the wing arched around to the corner.
So Scotland revert back to the big forwards...
Wales 13-17 Scotland
Wales stopped that one but Bevan penalised and Scotland will have another go. Take two...
Wales 13-17 Scotland
They absolutely do Chris... and they're threatening again.
Kick to the corner and they have a shot five metres out.
The Scottish lineout has not been great.
Wales 13-17 Scotland
Chris Horsman
Former Wales coach on BBC Radio Wales
It's going back and forth, it's a really cagey affair.
It's going be interesting now looking at the subtitute bench.
The game hasn't been played at a huge tempo but it's been physical.
I worry that Scotland look a little bit sharper when they get those opportunities where if they get a sniff of the ball they score.
Wales need four or five opportunities to score.
Wales 13-17 Scotland
Well that's a relief. Lana Skelton was down and the stretcher was rolled on but thankfully she gets back to her feet and is able to walk off... very slowly.
Molly Wright on for the hooker.
Meanwhile Kate Williams is on for Wales flanker Alisha Butchers.
Wales 13-17 Scotland
There's a pause in play for an injury.
Meanwhile tight-head prop Elliann Clarke is on for Christine Belisle to provide some fresh legs in the scrum.