Week 21

Growth spurt alert! Between week 20 and week 24 your baby will double in weight... yes, you read that right!
Hair is growing on your baby’s head, and tiny eyelashes and eyebrows are in place now.
You're passing along your antibodies in your blood supply, helping to protect the baby from infection. When you're pregnant, your body is very efficient at absorbing nutrients from food, so you don’t need to eat for two - but it is a good idea to try to eat sensibly.

Essential fatty acids

The essential fatty acids found in oily fish like salmon, mackerel and tuna are very good for both you and your developing baby. (Unfortunately for tinned tuna fans, only fresh tuna counts in this regard – the canning process strips most of the nutritious oils out of the fish.)
However, some types of fish aren't recommended during pregnancy, so you might want to check our foods to avoid page.


This is another essential building block of your baby's body. Your own body will make sure the baby gets enough calcium, no matter what – it will even take calcium from your skeleton if necessary! So eating plenty of calcium-rich foods, like dairy products, leafy greens and tinned fish with bones, is really a must in order to keep you both healthy.