单词	trimester
释义	trimestertri‧mes‧ter /trɪˈmestə $ traɪˈmestər/ noun [countable] Word Origin WORD ORIGINtrimester Origin: 1800-1900 French trimestre, from Latin trimestris, from tri- ‘three’ + mensis ‘month’ Examples EXAMPLES FROM THE CORPUS Abortions after the first trimester cost considerably more than those within the first twelve weeks. As pregnancy progresses, the placenta secretes more progesterone which peaks midway into the third trimester and then levels off. Athletes who have trained normally through the first two trimesters have delivered normal babies. 4. Coelocentesis may be suitable for prenatal diagnosis in the first trimester. Preeclampsia is a potentially fatal condition that usually strikes in the last trimester of pregnancy. She may even concede that hospitalisation is best, at least for the last trimester. Somehow, even the dumbest pregnancy cliches seem appealing in your second trimester. They also observed a maternal hypoglycaemic response in their subjects in the third trimester. word sets WORD SETS► Birth afterbirth, nounantenatal, adjectiveartificial insemination, nounbaby blues, nounbarren, adjectivebarrier method, nounbear, verbbirth control, nounbreast-feed, verbbreech birth, nouncaesarean, nouncap, nounchildbearing, nounchildbirth, nounconceive, verbconfinement, nouncontraception, nouncontraction, nounC-section, noundeliver, verbdelivery, noundiaphragm, nounDutch cap, nounembryo, nounembryology, nouneugenics, nounfamily planning, nounfertility, nounfertility drug, nounfertilize, verbfetal, adjectivefetus, nounfoetal position, nounfoetus, nounfull-term, adjectivegestation, noungonad, nounincubator, nouninduce, verbinduction, nouninfant mortality rate, nouninfertile, adjectiveIUD, nounIVF, nounmaternal, adjectivematernity, nounmidwife, nounmidwifery, nounmilk, nounmiscarriage, nounmiscarry, verbmorning-after pill, nounmorning sickness, nounmother-to-be, nounmum-to-be, nounnatal, adjectivenatural, adjectivenatural childbirth, nounneuter, verbnurse, verbobstetrics, nounoral contraceptive, nounoviduct, nounovulate, verbovum, nounperinatal, adjectivepostnatal, adjectivepreemie, nounpregnancy, nounpregnant, adjectivepremature, adjectivepresentation, nounprocreate, verbproduce, verbquickening, nounreproduce, verbreproduction, nounreproductive, adjectiverhythm method, nounspay, verbsterile, adjectivesterilize, verbstillbirth, nounstillborn, adjectivestretch mark, nounsurrogate mother, nounswaddle, verbswaddling clothes, nountermination, nountest-tube baby, nountrimester, nounultrasound, nounumbilical cord, noununborn, adjectivewean, verbzygote, noun 1American English one of three periods of equal length that the school year is divided into SYN term British English2one of the three-month periods of pregnancy
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