Early Pregnancy FAQs
1. When Does the First Trimester Start? When Does it End?
The first trimester is calculated starting from the first date of your last menstrual cycle. This is when there is no implantation or conception. If you had your period almost four weeks ago, then ovulated and had intercourse two weeks ago, you are four weeks pregnant. Thus, by the time you know that you are pregnant; you already might be five weeks pregnant. It is also said that the first trimester is the most critical time of your pregnancy. The first trimester usually lasts until the last day of the 12th week.