trimester
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菲律賓大學奧隆阿波推廣部
Accounting 選修課程包含風險管理，組織發展和管理法規等等。 每學年分為三個學期： 1st Trimester – 5月至8月 2nd Trimester – 9月至12月 3rd Trimester – 1月至4月 UPEPO Academic Programs UPEPO Admissions
Nakagawa S, Takemura Y; et al. Ovarian thecoma associated in the first trimester of pregnancy. J. Obstet. Gynaecol. Res. October 2004, 30 (5): 368–71 [2013-10-10]
药物流产
（原始内容存档于2023-10-19）. Zhang J, Zhou K, Shan D, Luo X. Medical methods for first trimester abortion. The Cochrane Database of Systematic Reviews. May 2022, 2022
互联网档案馆的存檔，存档日期2023-04-22. Gemzell-Danielsson, K; Lalitkumar, S. Second trimester medical abortion with mifepristone-misoprostol and misoprostol alone:
Gülmezoglu, AM; Hofmeyr, GJ; Cheng, L; Campana, A. Medical methods for first trimester abortion.. The Cochrane Database of Systematic Reviews. 9 November 2011