Morning sickness
Why nausea and vomiting happen in pregnancy, when they ease, what helps and when to call a doctor.
3 min read
First trimester
Week 7 of pregnancy
Your baby is the size of a blueberry, about a centimetre. The brain is growing fast and the face is starting to take shape.
Your baby is the size of a blueberry
- Length, head to bottom
- ≈ 1 cm
Your baby this week
- The brain grows very fast and the head is large compared with the body.
- The nostrils and the lenses of the eyes form.
- The arm buds lengthen and hands appear at their ends, still like tiny paddles.
- The umbilical cord has formed and connects the baby to the placenta.
Your body this week
- You may have more saliva than usual, and nausea may carry on.
- Needing to wee often continues, as the growing womb presses on your bladder.
- Constipation is common; water, fruit and vegetables help.
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General information written by the mam.al editors. Every pregnancy is different and sizes are averages; it does not replace advice from your doctor or midwife. Sources include the NHS week-by-week guide to pregnancy. NHS. Contains public sector information licensed under the Open Government Licence v3.0.