Blood draws to assess pregnant clients

After initial bloodwork, blood draws to assess pregnant clients are performed at other points throughout pregnancy as well. For each of the tests (numbered below), please list:
a. at what point in pregnancy we perform this test
b. what they are screening for, and why
c. what normal ranges in pregnancy are
d. what an abnormal value might mean
you may also feel free to add any tests that are standard in your community or subtract tests that are not standard in your community.

1. OGCT or OGTT or other glucose screening
2. re-check CBC
3. re-check ABO and Rh and antibodies
4. re-check Ferritin
5. (other)