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The 45 pages that link to Menstrual cycle, each with the reason it gives.

• InfertilityNarrower topic: Its phases determine when ovulation and the fertile window occur.

• OvulationNarrower topic: Ovulation is the cycle's egg-release event, usually near its midpoint.

• MenopauseNarrower topic: Menopause is defined by the permanent cessation of these cycles.

• ProgesteroneNarrower topic: Progesterone’s levels and effects vary across this cycle.

• Polycystic ovary syndromeNarrower topic: Understanding normal cycle timing clarifies what counts as irregular ovulation or infrequent periods.

• Emergency contraceptionNarrower topic: Cycle timing helps explain why pill effectiveness depends on whether ovulation has occurred.

• ImplantationNarrower topic: Its ovarian and uterine phases determine the timing of endometrial receptivity.

• DysmenorrheaNarrower topic: Pain timing within the cycle helps characterize dysmenorrhea.

• EndometriumNarrower topic: The endometrium’s growth and shedding form one of the cycle’s central changes.

• Cervical mucusNarrower topic: Its phases drive the cyclical changes in cervical mucus.

• Gestational ageNarrower topic: Gestational dating assumes a cycle pattern even when ovulation timing varies.

• Premenstrual dysphoric disorderNarrower topic: The disorder’s symptoms are defined by their timing within this cycle.

• MenstruationNarrower topic: Menstruation is the cycle’s bleeding phase, following changes in the ovaries and uterine lining.

• OvaryNarrower topic: Ovarian activity is coordinated with changes in the uterus and reproductive hormones.

• CervixNarrower topic: Cycle hormones change cervical mucus and the position of the cervix.

• AmenorrheaNarrower topic: Periods depend on coordinated changes across the menstrual cycle.

• AnovulationNarrower topic: Bleeding patterns provide clues to ovulation, though bleeding alone does not prove it occurred.

• Luteal phaseNarrower topic: The luteal phase is the cycle’s post-ovulation segment.

• Heavy menstrual bleedingNarrower topic: Cycle timing and regularity help distinguish heavy flow from other abnormal bleeding patterns.

• Premenstrual syndromeNarrower topic: The syndrome’s timing is defined by a recurring phase of this cycle.

• LevonorgestrelNarrower topic: Levonorgestrel’s contraceptive effect depends partly on where a person is in this cycle.

• Gregory G. PincusNarrower topic: Understanding its hormonal timing shaped the pill’s development and clinical testing.

• Vaginal bleedingNarrower topic: Cycle timing helps classify bleeding as expected menstruation or an altered pattern.