15 Hormonal Health Markers Women Should Track Throughout Their Lifetime

2. Progesterone - The Pregnancy Hormone and Mood Stabilizer

Progesterone, often called the "pregnancy hormone," plays an equally vital role in women's hormonal health as estrogen's complementary partner. Produced primarily by the ovaries after ovulation and by the placenta during pregnancy, progesterone serves multiple critical functions beyond supporting pregnancy. This hormone prepares the uterine lining for potential implantation, maintains pregnancy by preventing uterine contractions, and supports breast tissue development. During the menstrual cycle, progesterone levels rise significantly after ovulation, creating the characteristic temperature increase that fertility awareness methods utilize for tracking. Beyond reproductive functions, progesterone acts as a natural mood stabilizer, promoting feelings of calm and well-being while supporting healthy sleep patterns through its interaction with GABA receptors in the brain. Research indicates that adequate progesterone levels are essential for maintaining emotional balance, particularly during the luteal phase of the menstrual cycle when many women experience premenstrual symptoms. Low progesterone levels can contribute to irregular menstrual cycles, difficulty conceiving, increased miscarriage risk, mood swings, anxiety, insomnia, and weight gain. Conversely, optimal progesterone levels support regular ovulation, healthy pregnancy outcomes, improved sleep quality, and emotional stability. Women can track progesterone through blood tests, saliva tests, or by monitoring basal body temperature patterns, with testing typically recommended during the luteal phase (approximately 7 days after ovulation) for the most accurate assessment of production levels.