trimester
US /traɪˈmes.tɚ/
UK /traɪˈmes.tɚ/

1.
trymestr
a period of three months, especially as a division of the duration of pregnancy
:
•
She is in her second trimester of pregnancy.
Jest w drugim trymestrze ciąży.
•
The first trimester is often the most challenging due to morning sickness.
Pierwszy trymestr jest często najtrudniejszy z powodu porannych mdłości.