Ovulation is a regular event in the female reproductive cycle where a mature egg is released from an ovary. This process is orchestrated by various hormones and prepares the body for potential fertilization. Many individuals track ovulation to understand their fertility, and some notice subtle bodily changes during this time. This article explores whether ovulation can cause sensations of chills.
Body Temperature Changes During Ovulation
Basal body temperature (BBT) undergoes slight fluctuations throughout the menstrual cycle. Before ovulation, BBT remains in a lower range, often between 96°F (35.5°C) and 98°F (36.6°C). After ovulation, a distinct shift occurs, with a rise of about 0.4 to 1.0 degrees Fahrenheit (0.22 to 0.56 degrees Celsius).
This post-ovulatory temperature increase is sustained throughout the luteal phase, the latter half of the menstrual cycle. While this change is slight, it can be detected by consistently tracking BBT with a sensitive thermometer each morning before activity. Individuals may perceive these subtle shifts differently, leading to feelings of warmth or, for some, a sensation of coolness or chills as their body adjusts.
Hormonal Influence on Chills
The sensation of chills during ovulation is primarily linked to reproductive hormones, particularly estrogen and progesterone. Before ovulation, estrogen levels rise, influencing the body’s thermoregulatory center in the brain. Following egg release, a surge in luteinizing hormone (LH) triggers ovulation, and then progesterone levels significantly increase.
Progesterone is known to elevate core body temperature by about 0.5°C (0.9°F) during the luteal phase. This increase is a regulated shift, meaning the body’s internal thermostat adjusts to defend this higher temperature. While the body’s temperature is actually rising, the process of reaching this new set point can involve sensations of chills as the body’s systems work to adjust.
Other compounds like prostaglandins also play a role in thermoregulation and can contribute to bodily sensations. Prostaglandins are hormone-like lipids involved in the regulation of the female reproductive system, including ovulation and the menstrual cycle. Their influence on blood vessel dilation or constriction and their role in inflammatory responses may indirectly contribute to temperature perception.
When to Seek Medical Advice
While mild chills during ovulation can be a normal physiological response to hormonal shifts, certain accompanying symptoms warrant medical evaluation. Consult a healthcare professional if chills are severe, persistent, or accompanied by a high fever.
Other warning signs include significant pelvic or abdominal pain that is intense, interferes with daily activities, or lasts longer than two days. Unusual or foul-smelling vaginal discharge, heavy bleeding, or pain during urination could indicate an infection, ovarian cyst, or other underlying conditions. Keeping a record of symptoms, their timing, and intensity can be helpful for a healthcare provider in determining the cause.