21 weeks pregnant with twins: Twin pregnancy week by week

Read about your twin pregnancy from week 20+0 to 20+6. You’re now 21 weeks pregnant with twins.

By Kate Phillipa Clark

When you’re 21 weeks pregnant with twins, your babies will measure approximately 26,5 centimetres (10.43 inches) from crown to heel.

How are my babies developing?

The babies kidneys and urinary tracts are working. They have the important function of keeping the amniotic fluid volume normal. The babies are drinking the amniotic fluid and the kidneys excrete it again. Your babies sense of touch are still under development. They’re examining their surroundings with their hands and putting fingers and toes in their mouths. Your babies are receiving information about the world and about themselves through the sense of touch and are having new experiences continuously.

How might I feel?

Your uterus takes up quite a lot of space in your stomach and acid reflux and heartburn might bother you. There are medication you can take to remedy this, but you can also try natural antacids and heartburn remedies like for instance peppermint and milk. Avoid fatty and spicy foods. As the uterus grows, it will stretch the skin on your abdomen, which can cause itching. A good, rich cream can relieve this.
When you’re 21 weeks pregnant with twins, you may experience leaking a little colostrum from your breasts. It’s a yellowish or clear fluid and full of antibodies and immunoglobulins. When you’ve given birth – and if you choose to breastfeed – it will be the first milk your babies drink. When your milk supply increases, it changes from colostrum to breast milk. This usually happens a few days after birth.

What do you need to remember?

It will not affect your milk production or ability to breastfeed later, whether you experience leaking colostrum or not during pregnancy . The same applies to the size and shape of your breasts.
Remember taking an iron supplement, if your doctor or midwife recommends it.

The woman in this picture is 20+0 weeks pregnant with twins. She’s a first time mom.


The woman in this picture is 20+2 weeks pregnant with twins. The twins are her babies #2 and #3.

Read about next week – week 22


About the Author

Kate Phillipa Clark

Kate Phillipa Clark has a bachelor in Journalism and an Executive Master in Corporate Communication. She is an identical twin and so is her father.


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