Progesterone is a steroid hormone primarily secreted by the granulosa cells and the corpus luteum in the ovary. During pregnancy, a major source of progesterone also comes from the placenta.

Is progesterone a steroid or non steroid?

Progesterone is a steroid hormone belonging to a class of hormones called progestogens. It is secreted by the corpus luteum, a temporary endocrine gland that the female body produces after ovulation during the second half of the menstrual cycle.

Is progesterone a steroid hormone?

Progesterone belongs to a group of steroid hormones called 'progestogens' (which are hormones that have a similar action to the natural hormone progesterone). Synthetic hormones that have a similar action to progesterone are called 'progestins'.