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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Trichomoniasis a sexually transmitted infection which infects the genital area. It is caused by a tiny parasite called Trichomoniasis vaginalis. It is one of the most common sexually transmitted infections and you can get it more than once.

How do you get trichomoniasis?

Trichomoniasis is spread through unprotected vaginal sex. Women can pass it on to women or men during sex, but men do not seem to catch it from other men. The parasites can also live for a few hours on damp towels (but not toilet seats). For this reason don’t share towels, washcloths and similar items.

How do I know I have trichomoniasis?

Often people with trichomoniasis have no symptoms. For those who do, symptoms appear 4-20 days after the person is infected. Symptoms differ in men and women.

Trichomoniasis symptoms in women

  • Discharge from the vagina which is thin and foamy, light grey to yellowish-green and with or without an unpleasant ‘fishy’ odour.
  • Red sore and itchy genital area and vagina which can make walking or sitting difficult.
  • Burning and pain during sex or when urinating.

Trichomoniasis symptoms in men

Most men and boys don’t have symptoms but occasionally they may notice:

  • Slight discharge from the urethra (opening of the penis).
  • Burning or pain during sex or urinating.

Most doctors do not routinely test for trichomoniasis, but a simple swab can be taken to determine whether or not you have it. 

How do I get treated for trichomoniasis?

  • Antibiotics are used to treat infection with trichomoniasis. This can be a single dose or smaller doses over 5 days. If you have this infection while you are pregnant we can use a vaginal cream.
  • It is important to get tested for other STIs if you have this infection, and to notify you sexual partner(s).

What would happen if I didn’t get treated for trichomoniasis?

Trichomoniasis while you are pregnant can cause a baby to be born early or underweight. Rarely, it can be passed on from mother to baby during birth. Trichomoniasis can also increase the risk of both men and women becoming infertile, and there is a possibility that it can increase the risk of developing cervical cancer in women.

How can I protect myself from getting trichomoniasis?

Anyone who has sex is at risk of getting STIs and trichomoniasis. At Marie Stopes, we recommend:

  • Always use condoms or dams and a water-based lubricant when having sex, even oral sex.
  • If in a long-term relationship, ensure each partner has been tested before stopping condom use, and that neither of you has other partners.
  • Have regular STI checks.
  • Discuss STIs with your partner, even when it is difficult to talk about. Your partner will appreciate your honesty and that you don’t want to infect him/her. You have the right to know if they are infected too.