Rising global temperatures create mounting concerns for expectant mothers, as emerging evidence reveals how heat exposure during pregnancy can compromise both maternal and fetal health through multiple biological pathways. The stakes extend beyond individual comfort, potentially affecting birth outcomes and long-term child development across increasingly heat-stressed populations worldwide. Current research demonstrates that elevated ambient temperatures - whether from outdoor heat waves, inadequately cooled indoor environments, or workplace exposures - trigger physiological stress responses in pregnant women that can disrupt normal fetal development. Heat exposure appears to increase risks of preterm birth, low birth weight, and pregnancy complications through mechanisms including dehydration, cardiovascular strain, and altered blood flow to the placenta. The vulnerability window spans the entire pregnancy, with different trimesters showing distinct susceptibilities to heat-related complications. This emerging body of evidence carries profound implications for maternal health policy and clinical practice as climate change intensifies heat exposure globally. Unlike many environmental health risks that affect specific populations, heat exposure during pregnancy represents a universal concern that will likely affect millions of pregnancies annually as average temperatures continue climbing. The research highlights critical gaps in current prenatal care protocols, which typically don't address heat exposure as a modifiable risk factor. Healthcare systems may need to develop new screening tools and intervention strategies, particularly for vulnerable populations including outdoor workers, those in inadequately cooled housing, and communities experiencing extreme heat events. The findings suggest that effective heat mitigation during pregnancy could represent a significant public health opportunity, potentially preventing thousands of adverse birth outcomes through relatively straightforward environmental modifications and behavioral interventions.