Editing Obstetrics (section)

==== Third trimester ====
* [[Hematocrit]] (if low, the mother receives iron supplements)<ref>{{Cite web | vauthors = Uscher J |title=Anemia in Pregnancy: Causes, Symptoms, and Treatment |url=https://www.webmd.com/baby/guide/anemia-in-pregnancy |access-date=2022-04-29 |website=WebMD |language=en}}</ref>
* [[Group B Streptococcus]] screen. If positive, the woman receives IV penicillin or ampicillin while in labor—or, if she is allergic to penicillin, an alternative therapy, such as IV clindamycin or IV vancomycin.<ref name="Common Tests During Pregnancy"/>
* Glucose loading test (GLT) – screens for [[gestational diabetes]]; if > 140&nbsp;mg/dL, a [[glucose tolerance test]] (GTT) is administered; a fasting glucose > 105&nbsp;mg/dL suggests gestational diabetes.<ref>{{Cite web |title=Glucose challenge test - Mayo Clinic |url=https://www.mayoclinic.org/tests-procedures/glucose-challenge-test/about/pac-20394277 |access-date=2022-04-29 |website=www.mayoclinic.org |language=en}}</ref>

Most doctors do a sugar load in a drink form of 50 grams of glucose in cola, lime or orange and draw blood an hour later (plus or minus 5 minutes). The standard modified criteria have been lowered to 135 since the late 1980s.<ref>{{Cite web |title=Glucose tolerance test - Mayo Clinic |url=https://www.mayoclinic.org/tests-procedures/glucose-tolerance-test/about/pac-20394296 |access-date=2022-04-29 |website=www.mayoclinic.org |language=en}}</ref>
[[File:Ultrasonography of abdominal pregnancy.jpg|thumb|The result of an ultrasonography: a black and white image that shows a clear view of the interior abdomen]]