I have been having unprotected sex for the past year on Nexplanon….

…. and so far I have not gotten pregnant. However I had my period the whole summer (consistently for 20 days straight) and now I have not had anything at all. I was wondering about my chances of pregnancy from this or if it is from the irregularity of Nexplanon.


It is important to know that once someone has had the Nexplanon for a full week, they are 99% protected from pregnancy even if ejaculation in the vagina occurs. Remember, the Nexplanon does not protect against STIs. Only condoms and/or dental dams can do this.

In terms of your period, a very common side effect of the Nexplanon can be irregular bleeding. Some people lose their period completely; some have irregular spotting, and some people bleed more for the adjustment period. Sometimes it can take anywhere from 3-6 months for the body to adjust to the new hormone, or some people have unpredictable bleeding for entire time.  The reason this happens is because Nexplanon contains the hormones which over time stops the uterine lining from building up. Sometimes it will still build up and then shed. This is why someone may not have a period, or may have irregular bleeding.

So your irregular bleeding is likely due to the Nexplanon, but if you want to discuss it further or want to discuss ways to regulate the bleeding you can make an appointment with us at Teen Clinic by calling 303-442-5160.