X

Gestation Calculator

This calculator has been designed to give you an idea of the treatment options available to you*. If you decide to have an abortion with Marie Stopes UK, one of our nurses will give a more approximate gestation date during your appointment by way of a scan.
*Please note that this online calculator will only give you an estimated gestation based on the details you have provided.

Please select the first day of your last menstrual period.

 

 

We are here to support you 24 hours a day, 7 days a week

Call us now on 0345 300 8090 or email services@mariestopes.org.uk

services@mariestopes.org.uk
0345 300 8090

You are here

I've missed taking a combined pill

If you miss taking one of your combined pills, this reduces how well they work at preventing pregnancy.

Missing pills or starting the pack late can make the pill less effective. The chance of pregnancy after missing pills depends on when pills are missed and how many pills are missed.

  • Missing one pill anywhere in your pack or starting the new pack one day late is not a problem. You will still have contraceptive cover.
  • Missing two or more pills or starting the pack two or more days late may affect your contraceptive cover.

It is more risky to start a pack late and miss more than one pill. This is because during the seven day break your ovaries are not getting any effects from the pill. If you make the break week longer you may ovulate. If you are not sure what to do, continue to take your pill, use additional contraception such as condoms and seek advice.

If you are taking the combined pill Qlaira and have missed a pill, the information here may not apply to you. Seek advice.

If you miss pills and have also missed pills earlier in the pack or in your previous pack, speak to your doctor or nurse as you may need emergency contraception.

How many pills have you missed?

  • One pill missed - If you have missed one pill, or if you have started the new pack one day late, take the pill you missed now and continue taking the rest of the pack as usual. No additional contraception is needed and you do not need to use emergency contraception
  • Two or more pills missed - If you have missed two or more pills or if you have started the new pack two or more days late, take the last pill you missed now. Continue taking the rest of the pack as usual and leave any earlier missed pills. Use an additional method of contraception for the next seven days. If you have had unprotected sex in the previous seven days, you may need emergency contraception. Seek advice.

If seven or more pills are left in the pack after the missed pill:

  • Finish the pack
  • Have the usual seven day break or take the placebo tablets.

If fewer than seven pills are left in the pack after the missed pill:

  • Finish the pack and begin a new one the next day (this means missing out the break or not taking the placebo tablets).

Emergency contraception is only available for women or girls and comes in two forms, the intra-uterine device or IUD, or the so-called ‘morning after pill. Please note that as well as pregnancy, following unprotected sex you could be at risk of sexually transmitted infections (STIs) such as chlamydia and should visit your local genito-urinary medicine clinic (GUM clinic) or Marie Stopes Central London STI clinic for testing.