This will require a photography lab, like many one-hour places, so they can make those fine adjustments. Now that you have your camera and film ready it is time to consider different angles and framings for pictures. The obvious is photographing the laboring woman wherever she may be. Full-body shots of her lying on her side or resting in a birth tub are very nice. Avoid taking pictures of the genital area until the delivery is actually taking place.
Labor is a great time to focus on people's expressions and how they interact together.
Many photo opportunities will arise in simple scenarios like the laboring woman holding the hand of her partner. Or maybe she has an expression on her face that truly shows what she is feeling. If many family and friends are in the room, try for at least one picture of all of them near the pregnant woman in labor. For the actual delivery you will need to find a position to get the best pictures of the baby being born. This will depend a lot on what position she is in and what the practitioner feels about your presence.