Weight management
Weight gain in pregnancy varies greatly. Most pregnant people gain between 10kg and 12.5kg (22lb to 26lb), putting on most of the weight after week 20.
Much of the extra weight is due to your baby growing, but your body will also be storing fat, ready to make breast milk after your baby is born.
Putting on too much or too little weight can lead to health problems for you or your unborn baby.
Gaining too much weight
Putting on too much weight can affect your health and increase your blood pressure.
But pregnancy isn't the time to go on a diet, as it may harm the health of the unborn child.
It's important that you eat healthily. Gaining too much weight can increase your risk of complications.
These include:
Gestational diabetes: too much glucose (sugar) in your blood during pregnancy can cause gestational diabetes, which increases your risk of having a large baby
Pre-eclampsia: a rise in blood pressure can be the first sign of pre-eclampsia; although most cases are mild and cause no trouble, it can be serious.
Gaining too little weight
Gaining too little weight can cause problems such as premature birth and a baby with a low birth weight (less than 2.5kg or 5.5lb at birth).
It can also mean your body isn't storing enough fat.
Lack of weight gain can be related to your diet and weight before you become pregnant.
If you're concerned about your weight or any other aspect of your health while pregnant, ask your midwife for advice.