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What is it? The blood that leaves your body during your period is the blood and tissue that build up as the lining of your uterus each month. Your period flow can be light, heavy, or somewhere in between. Your periods may also vary in color. Sometimes menstrual blood will be light red and sometimes, dark red. It may also be heavy the first day or so of your period, and then get lighter. Periods usually last between three and five days, but it is normal to have periods that are either shorter or longer. It is also normal if your periods are not the same number of days each month. |
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How the reproductive system works |
Your reproductive system: on the inside
The ovaries are two small glands next to the uterus. The uterus (or womb) is like an inside pocket where a baby grows. Ovaries begin to make more estrogen and other hormones during puberty. This sparks the start of your menstrual cycle, which includes your period and other hormonal changes. |
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Symptoms of sexually transmitted infections (STIs) |
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Sexually transmitted infections (STIs) are diseases that you get by having sexual contact (vaginal, oral, or anal) with someone who already has an STI. STIs are the most common infectious diseases in the United States. They are caused by many different types of bacteria and viruses. There are more than 25 STIs that affect both men and women. Symptoms of the most common STIs are listed below. |
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Are there tests for STIs? |
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Yes, there are a number of tests for STIs. And the only way to know if you have an STI is to see a doctor or nurse for testing. If you are sexually active or have even had sex only once, you need to get checked. Many STIs do not have any symptoms but can cause infertility (making you unable to have a baby) and other serious illnesses, even before you know you are infected. A doctor can treat you and help you learn about healthy choices and how to protect yourself in the future. |
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What are sexually transmitted infections (STIs)? |
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sexually transmitted infections (STIs) are diseases that you get by having sexual contact (vaginal, oral, or anal) with someone who already has an STI. STIs are the most common infectious diseases in the United States. They are caused by many different types of bacteria and viruses. There are more than 25 STIs that affect both men and women. |
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