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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Pelvic inflammatory disease (PID)

PID is an infection of the womb and/or fallopian tubes. It is caused by an infection such as gonorrhoea, chlamydia or non-specific urethritis (NSU) spreading.

It is usually sexually transmitted and is the result of having unprotected vaginal sex with somebody with an infection such as chlamydia or gonorrhoea. It can also occur after a bowel infection or ruptured appendix, and some surgical procedures such as abortion.

How do I know if I have PID?

A lot of the time, women have no symptoms. If symptoms are present they include:

  • Pain in the lower abdomen
  • Abnormal vaginal bleeding
  • An unusual vaginal discharge
  • Pain when having sex or urinating
  • Heavy or more painful periods
  • Fever

A swab test from your vagina, cervix and/or urethra (bladder opening) can be taken if PID is suspected. Other tests can include blood tests, urine tests, ultrasounds and rarely a laparoscopy ( a special camera which can look inside your abdomen).

How do I get treated for PID?

Usually, PID can be treated with a course of antibiotics. Sexual partners need to be treated also.

What would happen if I did not get treated for PID?

PID can cause scarring to a woman’s fallopian tubes. This can cause infertility and dangerous complications in pregnancy. 

How can I protect myself from getting PID? 

To help prevent the spread of the bacteria which cause PID you should:

  • Always use a condom during sex.
  • Have regular STI check-ups.