Reading are back on the front foot and again it's a chance for Fara Williams, whose header fails to hit the target.

I wonder whether these two teams have practiced penalties?

Up the other end, this isn't a bad opportunity for West Ham's Brianna Visalli either.

Having latched on to a far-post cross, she takes a touch before scuffing her right-footed attempt wide of the near post.

This game remains ridiculously open.

Reading created so many opportunities during normal time and they've started the extra time period in much the same manner.

Lauren Bruton strides forward, cuts inside, beats a defender but then decides to pass instead of shooting. Wrong decision.

Jayne Ludlow
Wales manager and former Reading boss on BBC Sport

Image source, Reuters

It was a great second 45 minutes. What must be going through Fara Williams' head right now? She missed a penalty and a great chance near the end - but she's a very experienced player, she'll see that as a challenge

Right then, if the first 90 minutes couldn't find us a winner can the next 30? We're back under way.

And here is that missed penalty by Fara Williams...

In case you're just joining us, Reading took the lead through Rachel Furness' header, before Alisha Lehmann equalised with West Ham's only real chance of the half.

The Royals were then denied two penalties, either side of actually being awarded one, which was struck against the post by Fara Williams.

Williams then placed narrowly wide with a superb chance in stoppage time, as the Royals dominated but couldn't find a winner.

These two sides can't be separated yet, so 30 minutes of extra time now await.

Don't go anywhere...

Reading will scarcely be able to believe they haven't wrapped this game up in this second half.

Seconds remain, of normal time.

What a chance! Fara Williams misses from seven yards for Reading in stoppage time.

West Ham's Erin Simon completely missed her clearance, allowing the ball to bounce kindly for Williams in the area... But one of England's finest ever players places the ball agonisingly wide.

Fara Williams' left-wing corner curls just beyond the far post and drops behind everyone in the middle.

We're edging closer to extra time...

The game is really stretched now, as both sides commit players forward.

Fara Williams wins Reading a corner...

As six minutes of stoppage time are indicated by the fourth official, Kate Longhurst is suddenly back on the pitch.

She's going to carry on.

In case you missed it, this is how West Ham levelled matters midway through the second half...

Reading's Jade Moore takes out Kate Longhurst with a challenge from behind and Longhurst looks hurt.

She's surely going to have to come off here, and she's upset as she limps off with support from the medical staff.

At the other end, Fara Williams' close-range shot is blocked by Erin Simon.

Both teams are going for it now, trying to win it in normal time.

West Ham aren't too far away from pinching this game, as Jane Ross' flicked header from Gilly Flaherty's free-kick drops just wide of the far post.

Reading will have every right to feel hugely aggrieved if they don't win this semi-final.

But - that being said - when they did get a chance to score from the spot, Fara Williams missed the target!

It's been a fascinating second half.

Reading are calling for a penalty for a third time this half, as Lauren Bruton goes down as she's clipped by Erin Simon on the edge of the six-yard box.

Nothing given.

But replays show that one could well have been a penalty as well! Bruton was definitely caught and Simon got none of the ball whatsoever.

It's been a heated affair in this second half, with lots of fierce challenges flying in.

Wales and Reading's Tash Harding is the latest player to be booked.