Final answer:
During an early spontaneous abortion, the obstetrician should check the expelled placenta and fetal membranes, monitor the mother's uterus for involution, and consider breastfeeding as it can aid in the process.
Step-by-step explanation:
When a mother is known to be having an early spontaneous abortion, there are several things that should be checked. It is important for the obstetrician to examine the expelled placenta and fetal membranes to ensure that they are intact. This is to prevent any fragments of the placenta from remaining in the uterus and causing postpartum hemorrhage. In addition, the mother's uterus should be monitored to ensure that it is undergoing involution, a process where the uterus returns to its pre-pregnancy size. Breastfeeding can facilitate this process.