It is generally safe to take certain antibiotics during pregnancy if they are needed to treat bacterial infections. Some antibiotics considered safe include penicillins (like amoxicillin), cephalosporins (such as cefaclor and cephalexin), clindamycin, and metronidazole. These antibiotics are commonly prescribed and do not appear to pose significant risk to the fetus when used appropriately during pregnancy. However, other antibiotics such as tetracyclines (which can affect bone growth and teeth discoloration), fluoroquinolones, and some macrolides (like erythromycin and azithromycin) might carry risks or be used with caution due to potential side effects like heart rhythm issues or preterm birth. Nitrofurantoin may increase the risk of cleft lip in the first trimester but is safer later in pregnancy. Antibiotics should only be used during pregnancy when necessary and prescribed by a healthcare professional who will choose the safest option according to the timing in pregnancy, infection type, and dosage. Untreated infections can cause serious complications for mother and baby, so appropriate antibiotic treatment is important. In summary, many antibiotics are safe during pregnancy, but use should be carefully managed by a doctor to minimize any risks.