29 weeks pregnant

In week 29 of pregnancy, the size and weight of each baby varies considerably. But on average, they are roughly 26cm – measured from the top of their head to their bottom – and weigh about 2lb 8oz. However, yours may be bigger or smaller than this¹.

What is certain is that between now and the end of your third trimester, your baby will grow considerably, doubling, or in some cases, tripling in weight². And, while they are not yet ready to meet the world, their brain is developed enough to control essential functions such as breathing and body temperature¹.

Another organ, or pair of organs, that is beginning to function well in week 29 is the lungs. The complex network of air sacs and smaller airways within them is developed enough to breathe air by this stage, but they are by no means complete and your baby would most likely need extra help from a ventilator if they were to be born at this stage¹. Their lungs will continue to develop throughout pregnancy and into childhood³.

Your baby will continue to be very active during week 29, and you will probably notice lots of foetal movement – somersaults, prods and pokes as well as strong kicks¹.

While there is no set number of movements you should feel each day, you should be aware of your baby’s own patterns; perhaps they are more active after you have eaten, or when you sit down to relax at night.

Every pregnancy is different, but if you notice a change in your baby’s movement patterns, let your midwife or hospital know.

Thinking ahead – vitamin K for labour and birth

Although only required in tiny amounts – around 0.001mg a day per kilo of body weight⁴ – vitamin K remains an important component in your pregnancy diet. Vital for blood clotting, a lack of this vitamin in pregnancy can lead to complications for your baby after birth⁵. Although rare, it can lead to spontaneous bleeding and bruising anywhere in the body. A healthy level of vitamin K allows the blood to clot normally and reduces any such risks.

Most people get enough vitamin K in their diets without making an effort and it can also be made by some of the bacteria in your gut⁶. So while it’s not a nutrient you need to pay special attention to, it’s worth ensuring you are including some of the vitamin K sources listed below as part of your healthy pregnancy diet.

While vitamin K deficiency is rare in babies, most are given a booster injection after they are born.

Last reviewed: 11^th June 2019
Reviewed by Nutricia’s Medical and Scientific Affairs Team