Yes, pre-cum can contain sperm, which is enough to get someone pregnant. This means that the withdrawal method is not a safe way of preventing pregnancy.

Because pre-cum doesn't come from the testes it's much less likely to have sperm in it. However, it is possible for precum to pick up sperm that is already in the urethra on its way out. It’s also thought that some men leak small amounts of sperm into their precum. Either way, you can't guarantee that there won't be any sperm in someone's precum, so to avoid pregnancy it's important to use another form of contraception.

Abortions end a pregnancy after it has started. There are different ways to get an abortion. They normally involve either taking medication or having a minor surgical procedure. If you find out that you are pregnant, but don't want a baby, you might consider an abortion.

Be aware that in some countries there can be laws around abortions. It's important to make sure that your abortion is safe. It must be carried out by a trained medical professional at a licensed clinic. Other forms of abortion can be very dangerous for women.    

Periods and menstruation are a part of a woman's fertility cycle, also known as the menstrual cycle. This is the process that a woman's body goes through to get ready for pregnancy. To be ready for pregnancy a number of things have to happen to a woman's body. These are the different stages but bear in mind that the exact timings will vary from woman to woman.

Day 1 -5: The cycle starts on the first day of a woman's period when bleeding begins. The blood that comes out of the vagina is made up of the uterus lining. If a woman is not pregnant, the thick uterus lining that has built up over the month is not needed and starts to break down. The uterus lining must then be expelled, in the form of bleeding. Periods normally last between 2 and 7 days depending on the person.

Days 5- 14: Around day 5 is when a period would usually end. After a period is over the uterus starts to prepare again for a fertilised egg. At around day 14, the next egg is released. Women release a new egg from their ovary every month. It's around day 14 that a woman is most likely to get pregnant.

Days 15 -24: The egg that has been released from the ovary travels down the fallopian tube to arrive at the uterus, this can take a number of days. Meanwhile, the uterus is getting ready to receive the egg. By the time the egg arrives, a woman's uterus lining should be thick, so that there is a soft layer of tissue that an egg can be implanted into.

Days 25-28: If the egg has been fertilised by a sperm, when it reaches the uterus it will implant into the thick uterus lining. Nestled in the uterus lining a fertilised egg will be kept safe and have all it needs to grow. In this instance, the normal menstrual cycle is disrupted and a pregnancy begins instead. Alternatively, if the egg has not been fertilised, it will start to break down along with the uterus lining. The cycle begins again as another period starts.

Throughout the monthly cycle, women may experience changes in their moods and energy levels or experience cramping, tenderness in their breasts or other symptoms. These fluctuations are caused by the changing levels of hormones in their body that control the menstrual cycle. For women, getting to know how your body and mood changes throughout the month can help you understand where you are in your cycle.