We are a LDRP and special care nursery (level II) unit. Most RNs are labor & mom-baby trained. All NRP certified and can serve as second RN at deliveries. About a 3rd of the nurses are "core" and are also cross trained to the SCN, like myself (just coming off orientation). Any deliveries where there is fetal distress/crappy strips, mec, shoulders, vacs and urgent/stat cesareans we are to attend. Our Pedi hospitalists attended those deliveries as well.
Provided all is well with baby, the nursery nurse leaves and the labor nurse recovers mom and attends baby. After the first hour, usually the charge RN, or a RN with a mom-baby assignment will relieve that labor nurse so she can get caught up in charting. Our recoveries/turnovers usually take about 2 hours (more or less) before that couplet goes into a mom-baby assignment.
If a slow shift then the 2nd RN will usually stay after delivery and help with the recovery...and usually is responsible for "doing baby up" (measurements, meds, bath etc).