<unk>  is usually associated with specific symptoms. However, it is important to note that they are not necessarily all displayed simultaneously. Amenorrhea (absence of menstruation) occurs in about 20% of women with ovulatory dysfunction. Infrequent and light menstruation occurs in about 40% of women with ovulatory dysfunction. Another potential symptom is irregular menstruation, where five or more menstrual cycles a year are five or more days shorter or longer than the length of the average cycle. Absence of mastodynia (breast pain or tenderness) occurs in about 20% of women with ovulatory problems. Also possible is increased body mass and facial hair, which is relatively easy to treat, and is often associated with PCOS, or polycystic ovary syndrome. Associated conditions For most women, alteration of menstrual periods is the principal indication of chronic<unk> . Ovulatory menstrual periods tend to be regular and predictable in terms of cycle length, duration and heaviness of bleeding, and other symptoms. Ovulatory periods are often accompanied by midcycle symptoms such as mittelschmerz or premenstrual symptoms. In contrast,<unk>  usually manifests itself as irregularity of menstrual periods, that is, unpredictable variability of intervals, duration, or bleeding.<unk>  can also cause cessation of periods (secondary amenorrhea) or excessive bleeding (dysfunctional uterine bleeding). Mittelschmerz and premenstrual symptoms tend to be absent or reduced when a woman is anovulatory.
Anovulation
Anovulatory cycle
Gonadotropin-resistant ovary syndrome
Lactational amenorrhea
Polycystic ovary syndrome
Exercise amenorrhoea
Progestin-induced virilization
Primary ovarian insufficiency