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Pregnancy Trimester, First

The beginning third of a human PREGNANCY, from the first day of the last normal menstrual period (MENSTRUATION) through the completion of 14 weeks (98 days) of gestation.

Year introduced: 1976

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Subheadings:

Tree Number(s): G08.686.707.408

MeSH Unique ID: D011261

Entry Terms:

  • First Pregnancy Trimester
  • First Pregnancy Trimesters
  • Pregnancy Trimesters, First
  • Early Placental Phase
  • Early Placental Phases
  • Phase, Early Placental
  • Phases, Early Placental
  • Placental Phase, Early
  • Placental Phases, Early
  • Pregnancy, First Trimester
  • First Trimester Pregnancies
  • First Trimester Pregnancy
  • Pregnancies, First Trimester
  • Trimester, First
  • First Trimester
  • First Trimesters
  • Trimesters, First

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