Early pregnancy refers to the period before a missed menstrual period or shortly thereafter, typically within the first few weeks after conception. The body undergoes physiological adjustments, which can manifest in various physical sensations. This article explores whether chills can be an early sign of pregnancy and discusses other common indicators.
Chills as a Potential Early Pregnancy Sign
Some individuals report experiencing chills in early pregnancy, often without an accompanying fever. A primary factor is the fluctuation in hormone levels, particularly the rise in progesterone. Progesterone can influence the body’s thermoregulation, leading to periods of feeling colder or experiencing sudden chills.
Increased blood volume, which occurs as the body works to support the growing embryo, also plays a role. While this generally leads to a slightly higher body temperature, the redistribution of blood flow, with more directed towards the uterus, can temporarily reduce circulation to the extremities, causing cold sensations in the hands and feet.
Metabolic rate changes can also contribute to a feeling of being unusually cold. These pregnancy-related chills are typically not indicative of an illness if a fever is absent.
Common Indicators of Early Pregnancy
Beyond chills, several widely recognized signs appear in early pregnancy. A missed period is frequently the first and most reliable indicator for individuals with regular menstrual cycles. Some may experience light spotting or bleeding around the time their period would typically be due, known as implantation bleeding.
Nausea, often called “morning sickness,” can occur at any time of day or night, usually beginning between four and six weeks of pregnancy. Fatigue is also prevalent, with many experiencing tiredness due to hormonal changes. Hormonal shifts can lead to breast tenderness, swelling, or changes in the areola, similar to premenstrual symptoms but often more pronounced. Increased urination, heightened sensitivity to smells, and food cravings or aversions are also frequently reported. These symptoms vary greatly in intensity and presentation among individuals.
When Chills Signal Something Else
While chills can be an early sign of pregnancy, they are also a common symptom of various other conditions. Pregnancy-related chills typically occur without a fever. Chills accompanied by a fever, body aches, or sore throat often indicate an infection like a cold, flu, or other viral illnesses.
If chills persist or are accompanied by a temperature above 100.4°F (38°C), seek medical attention. Other potential causes for feeling cold or experiencing chills, unrelated to pregnancy or illness, include low blood pressure, anemia (iron deficiency), or an underactive thyroid. These conditions can affect the body’s temperature regulation and may require medical evaluation.
Confirming Pregnancy and Seeking Care
If pregnancy is suspected, take a home pregnancy test. These tests detect human chorionic gonadotropin (hCG), a hormone produced after a fertilized egg implants in the uterus. Home pregnancy tests are highly accurate, around 99% effective when used correctly, especially if taken after a missed period. Testing too early may result in a false negative because hCG levels might not yet be high enough.
A positive home test result should be confirmed by a healthcare provider. Early prenatal care benefits both the pregnant individual and the developing baby. Regular check-ups allow healthcare providers to monitor pregnancy progression, identify potential risks, and provide guidance on maintaining a healthy lifestyle for the best possible outcomes.