Reading are going to take the first penalty. It'll be winger Gemma Davison to get things started.

Both sets of players are getting some final words of encouragement from their gaffers.

How are your nerves, Reading and West Ham fans?

This semi-final is going to be decided by a penalty shootout, with a place in 4 May's final at Wembley at stake!

West Ham counter dangerously and work the ball across to Brianna Visalli on the right, but her shot flies wide across the face of goal.

There'll be at least two added minutes, before we head to a shootout, unless someone can win it.

To remind you, neither of these sides have ever been in a Women's FA Cup final before. History awaits, for one of them.

Rachel Furness has a strike at goal from range for Reading, but it bounces wide.

Is there going to be one last big chance?

Rosie Kmita comes on for West Ham's goalscorer Alisha Lehmann.

Does that mean Kmita is set to take a penalty in the shootout?

Image source, Reuters

We're less than five minutes away from penalty kicks now, with time running out.

Reading break well, looking for a late winner, but substitute Gemma Davison's shot is blocked.

From the free-kick, Adriana Leon opts to shoot rather than cross, but her swerving effort flies high and wide.

West Ham's Adriana Leon goes down, a few yards outside the penalty area, and the Hammers win a free-kick in a dangerous position.

Things have been a bit scrappy since the game got going again. Are both sets of players starting to tire?

Image source, Reuters

Can anyone find a winner, or are we set for penalties?

Plenty of action in that 15 minutes, but still it remains 1-1.

Even closer!

A Reading player - I'm not sure who - rises highest at the far post but West Ham just about clear it off the line.

The referee had actually blown up for a foul, which is just as well because the header may well have just about drifted in.

Nearly!

Gemma Davison cuts inside and fires a low, rasping shot across goal with her left foot, but it arrows narrowly wide of the far post.

Reading do have a corner, however...

There'll be two additional minutes at the end of this period.

Reading's Jo Potter can't continue here - she has a nasty cut on her face - so Sophie Howard is on in her place.

West Ham also make a change, with Erin Simon withdrawn for Vyan Sampson.

Who saw this one coming?

Reading's experienced midfielder Fara Williams, who has missed numerous chances but still been the Royals' best player, is replaced by Gemma Davison.

Now Lauren Bruton mistimes a tackle and is shown a yellow card by the referee.

This extra-time period is flying by.