The tiny arms and legs are growing, and the fingers are starting to separate, but are still webbed. Ears, eyes, nose and internal organs are starting to develop, and the baby is moving around inside the amniotic sac, although you won't be able to feel it yet.
If you haven't yet told your GP or midwife that you're pregnant, you should now do so with your pregnancy at 7 weeks. They need to make sure you're eating well, and not taking any medicines or doing any activities that might harm the baby's development. They'll also need to start booking appointments for your antenatal check-ups and scans. If you're unsure about your due date, you might need an ultrasound scan.
If you've got a cat or work with animals, you need to take special care when handling them. They can pass on infections such as toxoplasmosis, which may harm your unborn baby. If possible, pregnant women should avoid jobs like changing cat litter. You should also wear gloves when gardening, and wash hands thoroughly after handling animals or their faeces.