Can You Ace This Pregnancy Quiz? Only the Experts Score Over 80%!How is a "trimester" defined in relation to pregnancy?10%Next Correct Incorrect The correct answer is "The various phases of pregnancy, divided into specific timeframes." How is a "trimester" defined in relation to pregnancy? The last few weeks leading up to childbirth The period just before contractions begin The various phases of pregnancy, divided into specific timeframes The window when a woman has the highest chance of conceiving 10%