Post-Pill Bleeding: Side Effects or Menstrual Cycle?

Emergency contraceptive pills side effects

After taking the contraceptive pill on June 29, I experienced bleeding today.
Last month, my period started on June 17.
Should this be considered a side effect or my menstrual period? If it is a side effect, will I still have my period this month? Does the bleeding indicate that I will not be pregnant this time?

Niming, 10~19 year old female. Ask Date: 2019/07/05

Dr. Huang Jianzhong reply Obstetrics and Gynecology

On June 29, after taking the contraceptive pill, I experienced bleeding today.
Last month, my period was on June 17.
Should this be considered a side effect or my menstrual period? Answer: It is considered a side effect.
If it is a side effect, will I still have my period this month? Answer: Not necessarily.
Does bleeding mean that I won't get pregnant this time? Answer: Not necessarily.

Reply Date: 2019/07/05

More Info

Post-pill bleeding, often referred to as withdrawal bleeding, can occur after taking hormonal contraceptives such as birth control pills. This bleeding typically happens during the placebo week of a combined oral contraceptive regimen, where no active hormones are taken. However, if you experience bleeding shortly after starting the pill, it may be a side effect rather than a normal menstrual cycle.

In your case, since you started taking the pill on June 29 and experienced bleeding shortly thereafter, it is likely that this bleeding is a result of the hormonal changes induced by the contraceptive. Birth control pills work by altering the hormonal balance in your body to prevent ovulation, and this can lead to various side effects, including breakthrough bleeding, especially during the first few months of use as your body adjusts to the hormones.

Regarding your question about whether this bleeding counts as your period, it depends on the timing and nature of the bleeding. If the bleeding is light and occurs shortly after starting the pill, it is more likely to be withdrawal bleeding rather than a true menstrual period. Your actual menstrual cycle may still occur later in the month, depending on the specific formulation of the pill you are taking and your individual response to it.

As for the concern about pregnancy, if you have been taking the pill consistently and correctly, the likelihood of pregnancy is significantly reduced. However, if you missed any doses or started the pill late, there is a chance of ovulation occurring, which could lead to pregnancy. If you are unsure about your contraceptive use or have concerns about potential pregnancy, it is advisable to take a pregnancy test or consult with a healthcare provider for further guidance.

In summary, the bleeding you experienced is likely a side effect of starting the birth control pill, and it does not necessarily indicate that your menstrual cycle has begun. You may still have a regular period later in the month. If you have any further concerns or if the bleeding is heavy or accompanied by severe pain, it is important to seek medical advice to rule out any other underlying issues.

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