A woman’s heart while pregnant will need to pump more blood around the body to compensate for the blood being directed to their baby.

Because newborns have not developed an immune system, it will be hard for their bodies to fight the germs that gave them a cold. This means there is a higher chance that the illness may turn into something more dangerous or life threatening, such as croup or pneumonia. Medical treatment can help to prevent this.

If you're newly pregnant, it's not uncommon to feel repelled by the smell of a bologna sandwich or a cup of coffee, and for certain aromas to trigger your gag reflex. Though no one knows for sure, this may be a side effect of rapidly increasing amounts of estrogen in your system. Shortly after you become pregnant, hormonal changes prompt a chain of events that raise the rate of blood flow through your kidneys. This causes your bladder to fill more quickly, so you need to pee more often. One of the early signs of pregnancy is sensitive, sore breasts caused by rising levels of hormones.

Changes in your cervical mucus can signal when you are fertile. After your period has finished, your cervical mucus gradually increases in amount and changes in texture. This change reflects the rising levels of the hormone oestrogen in your body. It also shows you are close to ovulating.

Many women with endometriosis have pelvic or abdominal pain, particularly with their menstrual bleeding or with sex. Some women have no symptoms.

Emergency contraceptive pills are often called 'morning after pills' and sometimes even 'day after pills' because you can use them after sex to prevent pregnancy.