The latest Wellcome‑commissioned survey, covering 1,000 maternal‑health professionals across five continents, shows that a 1°C temperature spike is linked to a 5% jump in preterm birth rates.
Three‑quarters of respondents—about 73%—reported a surge in heat‑related complications among pregnant patients, while 76% noted worsening fetal or newborn outcomes in the past five years. These figures align with the UN’s warning that rising temperatures are fueling a spike in low‑birth‑weight and stillbirth cases.
Heat stresses the body’s thermoregulation, increasing core temperature and blood viscosity, which can compromise placental blood flow. Researchers say each degree of heat adds a 5% risk, and heatwaves can raise obstetric complication odds by a quarter.
Expectant mothers should stay hydrated, wear loose, breathable fabrics, and avoid outdoor activity during peak heat. Scheduling prenatal visits in the cooler morning or late afternoon can reduce exposure.
The survey also found that 27% of clinicians noted travel barriers to care during extreme heat, and 29% saw a rise in emergency visits. Hospitals can mitigate this by offering telehealth appointments and cooling stations in waiting areas.
If you’re pregnant or caring for a newborn, keep a thermometer handy, monitor for signs of dehydration, and discuss heat‑adaptation strategies with your healthcare provider. In hotter months, a simple cool shower or a fan can make a significant difference.