Is it obligatory for a pregnant woman to make up the eight missed days of Ramadan, or to pay expiation for them?

You must make up for the eight days you missed fasting, along with offering expiation by feeding one needy person for each day, because you delayed making them up beyond their designated time (the eleven months between the two Ramadans), provided the delay was without a valid excuse. However, if the excuse persisted, then only making up the fasting is required.