At 6 weeks, your baby is still only around 4mm (3⁄8 inch) long, measured from the top of the baby's head to the baby's bottom. Despite that tiny size, your baby has already done a lot of growing - the foundations of all the major organs are already in place. Eyes and ears are developing fast - and your baby's tiny heart begins to beat (at about twice the rate of an adult heart)
Every woman experiences pregnancy differently. Even though you have no visible signs, you might be experiencing any of the following symptoms:
- Tender, tingling or enlarged breasts
- Sickness or nausea
- A metallic taste in your mouth
- Tastes may change, e.g. you may 'go off' coffee or tea
- A need to urinate more frequently
- Overwhelming tiredness
- Mood swings
- Light 'spotting'
Reducing your caffeine intake
Many pregnant women 'go off' coffee or tea, and perhaps this is nature's way of encouraging them to cut down on caffeine. The latest research suggests limiting your caffeine intake to no more than 200mg per day.
It's fine to keep up with your usual exercise in early pregnancy, although you may want to avoid anything too extreme, such as high-impact aerobics or hard contact sports. And if you don't usually exercise, now might be the perfect time to start! Walking and swimming are good, gentle ways of keeping fit.
Exercise helps you feel great as well as improving your muscle tone and strength; this can help your body cope with weight gain and the demands of labour. If you're feeling exhausted, it might not seem like a great idea to go for a walk, but give it a go; getting out in the fresh air is one of the best ways to replenish your energy.
The NHS website has more information and advice on exercise during pregnancy.