When the egg gets fertilised anywhere other than the womb, like the fallopian tubes. A pregnancy is not safe unless it is in the womb and an ectopic pregnancy usually has to be terminated.

Male: when a boy reaches climax his penis produces sperm, also known as 'coming'. Sperm can also be present in pre-ejaculate or pre-cum, when the penis is aroused.

Female: some people may ejaculate when having a vaginal orgasm. A clear fluid spurts from glands close to the urethra during intense sexual excitement or during orgasm. The glands are called the Skene's glands (the equivalent to the female prostate.). During orgasm some women (10-40 per cent) experience the involuntary emission of fluid ranging from 30 to 150mL. This has become known colloquially as squirting, though this usually refers to a larger amount of liquid being excreted. Only 6% of people can ‘squirt’ on a regular basis. Don’t always believe what you see in porn!

The first name for an unborn baby in the very early stages of pregnancy, before it becomes known as a foetus.

The emergency pill is a form of contraception that can prevent pregnancy in most cases if acted upon within 5 days (or 120 hours) of having unprotected sex and is free of charge to young people from a range of local services. It’s also known as Emergency Hormonal Contraception (EHC). For more information see our Emergency Contraception page

A disease affecting girls in which the tissue that normally lines the womb grows on other organs outside of it. It can cause pain and fertility problems.

When sexual arousal causes a man's penis to swell and become hard or erect.