It's only natural to worry about gaining weight but don't worry, during pregnancy, it couldn't be more normal! Most pregnant women gain 8kg–14kg (17.5lb–30lb), most of which happens after week 20.
Much of this extra weight is due to your baby growing, but your body will also be storing fat, ready to make breast milk. However, 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. It can also increase your risk of complications such as gestational diabetes and pre-eclampsia.
However, pregnancy is not the time to go on a diet as it may harm the health of the unborn child. It's important that you eat healthily and maintain your normal daily activity or exercise unless you've been advised not to by your midwife or GP.
Gaining too little weight
Low weight gain can be related to your diet and weight before you become pregnant. Not gaining enough weight during pregnancy can mean that your body is not storing enough fat. It can also cause problems such as premature birth and babies with a low birth weight (less than 2.5kg/5.5lb).
However, some naturally slim women stay that way while they're pregnant and have perfectly healthy babies.
Advice about your weight
Your midwife or GP may have special advice for you if you weigh more than 100kg (14st) or less than 50kg (7st)
If you're concerned about your weight or any other aspect of your health when you’re pregnant, just ask your midwife or GP for advice.