Progesterone
Progesterone is a steroid hormone primarily produced by the corpus luteum in the ovary after ovulation. During pregnancy, the placenta becomes the major source. In men, small amounts are produced by the adrenal glands and testes. Progesterone prepares the uterine lining for implantation and maintains early pregnancy.
Why it matters: In women, progesterone is used to check for ovulation and to support early pregnancy. Low luteal-phase progesterone can be associated with difficulty conceiving and early miscarriage. Progesterone also has calming effects on the brain (GABA receptor modulation), and its drop before menstruation is associated with PMS symptoms.
May increase with:
May decrease with:
What is Progesterone?
Progesterone is a steroid hormone primarily produced by the corpus luteum in the ovary after ovulation. During pregnancy, the placenta becomes the major source. In men, small amounts are produced by the adrenal glands and testes. Progesterone prepares the uterine lining for implantation and maintains early pregnancy.
What might a high or low Progesterone mean?
In women, progesterone is used to check for ovulation and to support early pregnancy. Low luteal-phase progesterone can be associated with difficulty conceiving and early miscarriage. Progesterone also has calming effects on the brain (GABA receptor modulation), and its drop before menstruation is associated with PMS symptoms.
What can affect Progesterone?
It may be higher with: Ovulation (mid-luteal peak), Pregnancy, Progesterone supplementation (oral, vaginal, IM), Adrenal stimulation (stress — modest). It may be lower with: Anovulation (no corpus luteum formed), Menopause, Luteal phase deficiency, PCOS (often anovulatory), Stress (disrupts ovulation).
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