Certain tests can be done for the baby to check their health. In the first trimester- a blood test and an ultrasound exam can be helpful to check for any abnormalities or birth defects. Another non-invasive prenatal screening can check for chromosomal disorders. Thyroid tests, hepatitis, toxoplasmosis, tuberculosis, etc may also be some other tests that doctors may recommend based on the history, situation, and other factors.