An untreated urinary tract infection (UTI) during pregnancy can lead to severe health risks for both the mother and the developing fetus, most notably kidney infections (pyelonephritis), preterm labor, and low birth weight. Because pregnancy causes hormonal shifts and structural changes that slow down urine flow, even an asymptomatic UTI can quickly escalate into a complicated medical issue.Fetal and Neonatal ComplicationsWhen a UTI is left untreated, the resulting inflammation and bacterial spread can directly impact the pregnancy:Preterm Labor and Delivery: UTIs can trigger premature uterine contractions, leading to birth before 37 weeks.Low Birth Weight: Babies born to mothers with untreated UTIs are at a higher risk of weighing less than 2.5 kg at birth.Intrauterine Growth Restriction (IUGR): The infection can impair proper fetal development in the womb.Premature Rupture of Membranes (PPROM): The bacterial infection can weaken and prematurely rupture the amniotic sac.Neonatal Infection: The bacteria can be passed to the newborn during delivery, potentially causing newborn sepsis.Maternal ComplicationsA simple bladder infection can ascend into the upper urinary tract, leading to serious systemic health issues:Acute Pyelonephritis (Kidney Infection): Up to 30% of untreated UTIs progress to this severe condition, which typically requires hospital admission and intravenous antibiotics.Maternal Sepsis: The infection can breach the bloodstream, causing a life-threatening, body-wide inflammatory response.Preeclampsia: Active UTIs, particularly in the third trimester, are strongly linked to a dangerous spike in maternal blood pressure.Maternal Anemia: Chronic or severe urinary tract infections can interfere with red blood cell production.Acute Respiratory Distress Syndrome (ARDS): In rare cases, endotoxins from severe kidney infections can cause severe lung inflammation and fluid buildup.
