Science / Astrology / Prenatal Epoch: The astrological moment of conception. According to Ptolemy, the natal Ascendant or Descendant coincides with the Moon's zodiacal position at the prenatal epoch, ten lunar months prior to birth, more or less; used primarily in chart rectification.
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Science / Biology / Prenatal Testing: Testing to detect the presence of a genetic disorder in an embryo or fetus; commonly done by amniocentesis or chorionic villi sampling. MORE
Health / Vitamins / Prenatal Vitamins: Specially formulated multivitamins that ensure a pregnant woman gets enough essential micronutrients. Prenatal supplements generally contain more folic acid, iron, and calcium than standard adult supp MORE
Science / Astrology / Prenatal Epoch: The astrological moment of conception. According to Ptolemy, the natal Ascendant or Descendant coincides with the Moon's zodiacal position at the prenatal epoch, ten lunar months prior to birth, more MORE
Science / Geology / Polarity Epoch: An interval of time between reversals of Earth's magnetic field. MORE
Science / Tides and Currents / National Tidal Datum Epoch: The specific l9-year period adopted by the National Ocean Service as the official time segment over which tide observations are taken and reduced to obtain mean values (e.g., mean lower low water, etc MORE