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Contraceptives

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Some contraceptives, particularly the progestogen-only or mini-pill and the injection (Depo-provera), may cause infrequent or absent periods. Some women have infrequent periods because of a specific imbalance of reproductive hormones which is not associated with stress, weight loss or any of the other conditions listed above.

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  • Stress
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  • Chronic Ill Health
  • Drugs
  • Contraceptives
  • Polycystic Ovarian Syndrome
  • Hyperprolactinaernia
  • Premature Menopause
    • Due date & Gestational age based on period

      Due date & Gestational age based on period

      Due Date Calculator based on Last Menstrual Period (LMP).
      Enter the first day of your Last Menstrual Period and the length of your cycle in order to estimate your Due Date and the gestational age at present.
      Note, all dates given are estimates; We will give you a more accurate indication of your due date when you have your 7-10 week ultrasound scan.

      Enter first day of last menstrual period:

      Length of menstrual period cycle:

      Calculate
    • Gestational Age based on Due Date

      Gestational Age based on Due Date

      Gestational Age based on the Due Date
      If you know your due date, you can calculate how many weeks of pregnancy you have completed so far.

      Enter your due date:

      Calculate
    • Fertility calculator

      Fertility calculator

      Enter the date of your last menstrual period and the length of your cycle to show the period at which you are most fertile.

      Date of your first day of your last menstrual period:

      Ferility Window:

      Calculate