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Causes

Home > Medical Issues  > Obstetrical  > Medical Problems of Pregnancy  > Low Birth Weight & SGA > Causes

The commonest cause of SGA is wrong dating of the pregnancy but an early ultrasound scan confirms when conception occurred. Malnutrition of the mother is a cause of being born too small but the placenta and developing baby receive nutrition preferentially. Babies maybe genetically programmed to be small yet are completely normal and healthy. Small babies from small mothers develop normally and do not need special attention. ln certain ethnic groups, the average birth weight is lower: this is evident when Japanese babies are compared with European babies.

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  • Causes
  • SGA Babies
    • 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