C2 noun #146,902 最常用

time period extending from the first day of the last menstrual period through 12 weeks of gestation

first trimester 30秒了解

  • (noun) time period extending from the first day of the last menstrual period through 12 weeks of gestation

Meanings

  1. 1
    noun time period extending from the first day of the last menstrual period through 12 weeks of gestation
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