While in days gone by Dads were banished to the waiting room, birthing is now a father-friendly process, and you’re encouraged to be part of it. Why? Because you really can make a genuine difference in helping your partner feel relaxed. She’s in extreme pain and discomfort, probably away from home, and surrounded by strangers talking medical jargon.
Even if you’ve skipped on ante-natal classes, it's incredibly reassuring for her to have someone she loves and trusts around her. But you need to check with her that this is what she wants. She may feel that she can’t say no and that she wants her best friend there instead, or her best friend and you.
If you're separated from the mother of your child and she doesn't want you at the birth, respect her wishes - you'll do yourself no favours in the long run if you try and force the issue and make an already stressful situation worse.