Progesterone hormones vary in levels especially in women. In some conditions, it gets high, and in others it becomes low. Progesterone levels gets low when a woman is menstruating and maintains the level until it is time for ovulation. Ovulation period occurs during the normal menstrual cycle when there is discharge of eggs from a follicle in the ovary. After the egg is discharged, the follicle is called corpus luteum, and it then starts producing more progesterone which really increases the level. The progesterone hormone works on the endometrium to increase its thickness and richness in blood supply and also to make it ready for implantation by the egg. However, the level reduces drastically when the egg is not fertilised. This makes the endometricum to discharge, leaving behind a thin layer of tissue.

In a case where fertilisation occurs, the ovary goes on with the production of progesterone within the early weeks of pregnancy. When the embryo gets implanted in the uterus, the placenta starts taking shape. From then on, the placenta begins to produce more progesterone. General progesterone levels are very important when it comes to pregnancy issues, especially when the pregnancy is in its early stages, the progesterone levels helps the muscles to be stable. As the embryo grows, progesterone generates other hormones that are needed for general fetal growth. Progesterone also aids the breast to generate milk after the baby is born and prevents it from releasing milk before then.

However, if the progesterone levels become low, it may be hard for a woman to have conception or to be able to sustain the pregnancy. When the progesterone level gets low during the early stages of pregnancy, it causes miscarriages. Whether the progesterone hormone level is high or low, the condition can be corrected by using progesterone supplements. It will help women to conceive and also help in sustaining the pregnancy.