Why is my period late after I stopped the pill?

It is common for a period to come late, come irregularly, or not come at all for a while after stopping the pill, and the first thing to rule out is pregnancy. The WHO says fertility returns quickly after stopping the pill, with no delay, so a late period can be a pregnancy even if you have only just come off it. MedlinePlus names pregnancy as the most common cause of missed periods. This page cannot tell you why yours is late, so it sticks to what the sources say is common, what to note down, and when to call.

What the sources say

• The pill can change bleeding while you take it. The WHO says some women on the pill notice lighter, irregular or absent bleeding, and that these effects are not harmful and often improve over time.
• Periods can take time to return. MedlinePlus says women who take birth control pills or hormone injections may not have any monthly bleeding, and that when they stop, their periods may not return for more than 6 months.
• Stopping the pill is not a fertility problem in itself. The WHO says oral contraceptives do not cause infertility.
• Other causes are still possible. The NHS lists pregnancy, stress, the start of menopause (usually between 45 and 55), PMOS (which used to be called PCOS), sudden weight loss, being overweight, doing too much exercise, breastfeeding, and some medical conditions such as diabetes or an overactive or underactive thyroid. MedlinePlus adds low body fat and severe anxiety or emotional distress.
• The pill is also used as a treatment. The NHS gives the combined pill as one treatment doctors use to make periods more regular in PMOS, so it is worth telling a doctor why you were prescribed it in the first place.

What is worth writing down

The useful details for a doctor are the date you took your last pill, the date and length of your last bleed, any pregnancy test and its date, and anything else that has changed, such as weight, tiredness, skin or hair, or breastfeeding. A period tracker built for Muslim women keeps the date you stopped and every date after it in one place, and Nisaa is free on the App Store.

If you are a Muslim woman wondering about prayer and fasting

This page does not issue a ruling. Whether bleeding that arrives after you stop the pill counts as hayd, and how it differs from istihadah, is a fiqh question with its own pages:

• What counts as hayd. See what counts as hayd for the signs and the limits each school sets.
• Bleeding that does not follow your pattern. See telling istihadah apart from hayd.
• If you stopped a pill you took on purpose to delay your period. See how period delay pills work for Ramadan or Umrah.

When to speak to a doctor

• The NHS says to see a GP if you have missed your period 3 times in a row, if your periods have become irregular, or if you have missed a period along with other symptoms such as weight gain or loss, tiredness, or hair growth on your face.
• MedlinePlus says to see a health care provider if you have missed more than one period, so that the cause can be found and treated if needed.
• If there is any chance you are pregnant, a home pregnancy test is a sensible first step.

Related questions

For the wider list of reasons a period can be late, see why your period might be late. If your cycle stays unpredictable for months, see why your periods might be irregular.

If you tested and the result was negative, a late period with a negative pregnancy test explains when to retest.