Try not to sweat it if you experience light bleeding or spotting during week five of your pregnancy. It actually happens in up to 30 percent of pregnancies during the first trimester, according to Parenting Magazine. Typically, early pregnancy bleeding is light in volume and red or brownish in color. This type of spotting is often called implantation bleeding, which takes place in some women when the successfully fertilized egg burrows its way into the lining of the uterus. Obviously, any excessive bleeding, particularly if accompanied by cramping or backache, warrants a call to your doctor. He or she might want to bring you in for an ultrasound and for blood work to check your pregnancy hormone levels.
Bear in mind that pregnancies vary widely between women. Some women spot lightly the entire nine months, while others avoid it altogether. I have one friend who began bleeding so profusely that she rushed to the emergency room -- and her perfectly healthy baby was born eight months later. So, take a deep breath and do your best to keep the worrying to a minimum. I know it's much easier said than done, but it really is best to limit stress for you and your unborn child.