Feeling warmer than usual is common during pregnancy. This sensation often begins early and can persist throughout. It is a normal physiological adjustment as the body undergoes significant changes to support the developing fetus.
Hormonal Shifts and Metabolism
The increase in core body temperature during pregnancy is influenced by hormonal changes, primarily elevated levels of progesterone. Progesterone has a thermogenic effect, generating heat. This hormone is crucial for maintaining pregnancy, and its continuous presence keeps the basal body temperature elevated, similar to the temperature rise experienced after ovulation. If pregnancy occurs, progesterone levels remain high, leading to a sustained increase in body temperature.
The body’s metabolic rate also increases substantially during pregnancy. This rise in basal metabolic rate (BMR) supports the growth of the fetus, the placenta, and the expansion of maternal tissues like the uterus and breasts. As the body works harder to fuel these processes, more energy is produced, and heat is generated as a byproduct. The BMR can increase by approximately 15-25% over pre-pregnancy values, with the most significant increases occurring in the second and third trimesters.
Circulatory Changes and Sweating
The circulatory system undergoes considerable adaptations during pregnancy, contributing to the sensation of warmth. Blood volume increases significantly, leading to enhanced blood flow throughout the body, including closer to the skin’s surface. This increased circulation helps distribute heat, making the skin feel warmer. The body uses vasodilation, the widening of blood vessels, to dissipate excess heat.
With an elevated core body temperature and increased blood flow, the body’s natural cooling mechanisms become more active. Sweating often becomes more pronounced as the body attempts to regulate its temperature. This physiological response helps prevent overheating.
Strategies for Staying Cool
Staying well-hydrated is a practical way to manage increased body warmth during pregnancy. Drinking plenty of water helps the body regulate its temperature and supports overall physiological functions. Loose-fitting clothing made from natural, breathable fabrics like cotton can promote air circulation and dissipate heat.
Utilizing cooling aids such as portable fans, misting sprays, or cool compresses can provide immediate relief. Adjusting the environmental temperature by using air conditioning or seeking shaded areas outdoors can significantly improve comfort. Avoiding strenuous activities during the hottest parts of the day helps prevent excessive heat generation and discomfort.
When to Consult a Doctor
While feeling warmer is a normal aspect of pregnancy, certain symptoms warrant medical attention. Seek advice from a healthcare provider if experiencing signs of overheating, such as dizziness, extreme fatigue, nausea, or a headache, especially if accompanied by a high fever. These symptoms could indicate that the body’s cooling mechanisms are struggling.
Persistent or severe symptoms like a sustained high fever (above 100.4°F or 38°C) or signs of dehydration, including reduced urination or dry mouth, should prompt a call to a doctor. It is always important to consult with a healthcare professional for any concerns during pregnancy.