anovulatory cycle

Women with epilepsy have more anovulatory cycles than other women do.

These are always anovulatory cycles due to hormonal disorders.

This is termed an anovulatory cycle (a cycle without ovulation).

Normal menstrual flow can occur without ovulation preceding it: an anovulatory cycle.

These are called anovulatory cycles.

In anovulatory cycles using progestogen-only contraceptives, the endometrium is thin and atrophic.

An anovulatory cycle is a menstrual cycle during which the ovaries do not release an oocyte.

There is a strong association with abnormal menstruation - amenorrhoea, anovulatory cycles or luteal cell defects.

Anovulatory cycles commonly occur before menopause (perimenopause) and in women with polycystic ovary syndrome.

Polycystic ovary syndrome (also known as Stein-Leventhal syndrome) and hyperprolactinemia can also cause anovulatory cycles through hormonal imbalances.

The anovulatory cycle is a menstrual cycle characterized by varying degrees of menstrual intervals and the absence of ovulation and a luteal phase.

At body weights close to the required minimum women may still have anovulatory cycles even if they are menstruating because of a lack of peripherally produced oestrogen in adipose tissue.

As there is no progesterone in the anovulatory cycle, bleeding is caused by the inability of estrogen - that needs to be present to stimulate the endometrium in the first place - to support a growing endometrium.

Although the use of a minimum progesterone value to exclude data from anovulatory cycles from the analyses helped ensure acquisition of the mid-luteal phase samples, only 52% of samples were obtained on exactly the 5 thday from ovulation.

While the normal menstrual cycle in the human typically lasts 4 weeks (28 days, range 21-35 days) and consists of a follicular phase, ovulation, and a luteal phase, followed by either menstruation or pregnancy, the anovulatory cycle has cycle lengths of varying degrees.