Pregnancy in weeks, months, and trimesters

How lengthy is pregnancy? The short response is 280 days, 40 weeks, 3 trimesters, or somewhat more than 9 months. Yet, most ladies don't conceive an offspring at precisely 40 weeks pregnant, so it's difficult to know precisely how lengthy until you meet your child. Your due date is only a decent speculation - yet it's useful. So is being familiar with pregnancy trimesters and how to make an interpretation of weeks to months in pregnancy. (Our pregnancy long stretches of time graph will help!)