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

PubMed search builder options

Subheadings:

Restrict to MeSH Major Topic.

Do not include MeSH terms found below this term in the MeSH hierarchy.

Tree Number(s): G08.686.707.408

MeSH Unique ID: D011261

Entry Terms:

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

Previous Indexing:

• Gestational Age (1968-1974)
• Pregnancy (1966-1974)
• Time Factors (1967-1974)

All MeSH Categories
Phenomena and Processes Category
Reproductive and Urinary Physiological Phenomena
Reproductive Physiological Phenomena
Pregnancy Trimesters
Pregnancy Trimester, First