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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.

 

 

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My contraceptive ring has fallen out

If your vaginal ring falls out, re-insert it as soon as possible. The longer the ring has been out of the vagina, the higher the risk of pregnancy. You may also experience breakthrough bleeding.

If the ring comes out of the vagina for less than three hours:

  • Rinse the ring with cool or lukewarm water (not hot) and re-insert the same ring as soon as possible within three hours.
  • You don’t need to use additional contraception and you are protected against pregnancy.

 If the ring has been out for more than three hours in the first or second week of use:

  • Rinse the ring with cool or lukewarm water (not hot) and re-insert the same ring as soon as possible.
  • You must use additional contraception until the ring has been in place for seven continuous days.
  • Ask your doctor or nurse for advice if you have had sex in the previous few days and didn't use a condom as you may need emergency contraception.

 If the ring has been out for more than three hours in the third week of use, throw the ring away and choose one of the following two options:

  1. Insert a new ring immediately and start a new ring cycle. You may not experience a withdrawal bleed but breakthrough bleeding or spotting may occur, or
  2. Do not insert a new ring. Start your seven day, ring-free interval. You will have a withdrawal bleed. Insert a new ring seven days from the time the previous ring came out of the vagina. This option can only be chosen if the ring was used continuously for the previous seven days.

In both cases, you must use additional contraception until the ring has been in place for seven continuous days.  Ask your doctor or nurse for advice if you have had sex in the previous few days and didn't use a condom as you may need emergency contraception to reduce the risk of an unintended pregnancy.

If you lose the vaginal ring, insert a new one and continue with the cycle that you were on.

Emergency contraception comes in two forms, the intra-uterine device or IUD, or the so-called ‘morning after pill':

  • The IUD or copper coil is a small plastic and copper device that is fitted into the uterus through the cervix using a simple procedure that takes a few minutes. it stops an egg implanting in the uterus. IUDs can be fitted up to 5 days after unprotected sex, or sometimes later depending on the usual length of your cycle. The efficacy is 99%.
  • This progesterone-only pill is a hormone pill and works by delaying the release of an egg from an ovary, therefore preventing pregnancy. The emergency contraceptive pill or ‘morning after pill’ can be taken up to 120 hours (5 days) after unprotected sex. Efficacy varies, depending on when in your cycle the sex happened. However the IUD is more effective at preventing pregnancy.

Emergency contraception is more effective the quicker you act, so if you’ve had unprotected sex, you should visit a Marie Stopes UK clinic, your GP or local sexual health centre as soon as possible.

If you want to find out whether you are pregnant, a pregnancy test will not be accurate until 2-3 weeks after the sex happened. It is advisable to take a pregnancy test after using the emergency contraceptive pill, as failure is quite common. 

You should only use emergency contraception in an emergency and not as a regular form of contraception.

Please note that as well as pregnancy, unprotected sex puts you at risk of sexually transmitted infections (STIs) such as chlamydia, You should visit your local genito-urinary medicine clinic (GUM clinic) or Marie Stopes Central London STI clinic for testing.