Helth Online

What Is the First Trimester of Gestation?   The first trimester is the foremost phase of gestation. It starts on the first day of your last period-- before you ’re indeed actually pregnant-- and lasts until the end of the 13th week. It’s a time of great expectation and of rapid-fire changes for both you and your baby. Knowing what to anticipate will help you get ready for the months ahead.   First Trimester Changes in Your Body   Gestation is different for every woman.Then are some of the changes you might notice, what they mean, and which signs warrant a call to your croaker.     Bleeding. About 25 of pregnant women have slight bleeding during their first trimester. Beforehand in the gestation, light finding may be a sign that the fertilized embryo has implanted in your uterus. But if you have severe bleeding, cramping, or sharp pain in your belly, call the croaker. These could be signs of a confinement or ectopic gestation (a gestation in which the embryo implants outside of the uter