What Is Progesterone And Why Does Your Body Need It

What is progesterone?

It is a hormone produced in the ovaries of women.

What Is Progesterone

progesterone molecule

It is also produced by men, but in small amounts.

It is a fundamental hormone and is the forerunner for the production of additional, important hormones including oestrogen and cortisone. Progesterone, in conjunction with oestrogen, works to regulate a woman’s reproductive cycle.

Why Does the Body Need Progesterone


hormone levels during 28 day cycle

Progesterone is considered critically important to a woman’s health. It is produced prior to ovulation to prepare a woman’s uterus for accepting a fertilized egg. Each month, during a woman’s childbearing years, progesterone is secreted from within the ovaries signaling the body to thicken the lining of the uterus, so that a fertilized egg may attach and begin to develop.

If a woman becomes pregnant, progesterone is then produced by the placenta to maintain pregnancy and prevent rejection (spontaneous abortion) of the embryo. When pregnancy does not occur, the levels of progesterone decrease, and the thickened uterine lining along with the unfertilized egg is shed in the menstrual period.

The most important role relative to a woman’s general health, is to keep the level of oestrogen in a woman’s body in a balanced state. Unchecked oestrogen can lead to very serious medical issues including increased risk for breast cancer or cancer of the reproductive organs.

In addition to the reproductive system, it also stimulates thyroid activity, reduces inflammation, helps with immunity, blood-clotting abilities and other functions of the body. It is also used in synthetic (man-made) form to help with treatment of menstrual problems, prevent miscarriages and for birth control.

The body requires progesterone during all of the different phases of a woman’s life. It is therefore important that a woman’s body continues to generate progesterone even in the post-menopausal years, especially to prevent conditions such as osteoporosis.


Progesterone also known as P4 (p regn- 4-ene-3,20-dione) is a C-21 steroid hormone involved in the female menstrual cycle , pregnancy
The ups and downs of hormones

Progesterone, which is produced by the ovaries and the adrenal glands after ovulation, maintains healthy cell growth in the uterus. Estrogen is created by the ovaries, the adrenal glands, and fat cells and prepares the uterus to accept a fertilized egg
Is Progesterone the Answer to Estrogen Dominance and Hypothyroid?

A Hypothyroid reader wrote: Hi all! I was diagnosed this week with estrogen dominance and prescribed bio-identical progesterone. I’m very hopeful that this is the last piece of the puzzle for me and I’m going to finally find a 

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