After taking Plan B, three things may happen in a woman's body to prevent pregnancy. WebMD explains that Plan B One-Step may prevent or delay ovulation, interfere with fertilization of an egg or prevent implantation of a fertilized egg by changing the uterine lining. Plan B does not cause miscarriage or abortion, and it does not stop fetal development once a fertilized egg implants in the uterus.Know More
According to WebMD, Plan B is a type of over-the-counter emergency contraception. Its dose is a single pill that contains 1.5 milligrams of levonorgestrel. The risk of pregnancy is reduced by up to 89 percent when Plan B is taken within 72 hours of unprotected sex. When taken within 24 hours, Plan B is about 95 percent effective.
Plan B is not as effective as regular contraception, and it should not be used as a woman's main form of birth control. A woman should not take Plan B if she knows or suspects she is pregnant, has a history of allergy to any ingredients in Plan B or has a history of abnormal vaginal bleeding that has not been evaluated by a doctor. Side effects that may occur after taking Plan B include nausea, abdominal pain, fatigue, headache, dizziness, vomiting and breast tenderness. The medication may also cause unexpected bleeding and menstrual changes, notes WebMD.Learn more about Birth Control
The emergency contraception Plan B One-Step causes spotting because the levonorgestrel it contains may alter the lining of the uterus to prevent a fertilized egg from implanting, states WebMD. Plan B may also cause menstrual changes, prevent or delay ovulation and prevent an egg from becoming fertilized.Full Answer >
Plan B can make the patient's next period a few days early or late, according to WebMD. In addition, some women experience unexpected bleeding, and some may notice a difference in their period's flow.Full Answer >
Although the Plan B pill can affect the timing of the next period after its use, it should not stop menstruation once it has started. This pill can cause menstrual flow issues at the next period after its use, states WebMD.Full Answer >
According to WebMD, a woman can experience menstrual changes after taking Plan B. Most commonly, a Plan B user experiences lighter periods, heavier periods or irregular spotting for a few weeks after taking the drug.Full Answer >