20 weeks

20 weeks along, and the anomaly scan is tomorrow! So, by 9.30am we should know whether the baby is healthy, fully formed, active and growing well. We may also know the sex (if the wee sprout behaves a little more cooperatively than s/he did for the 12 week scan and doesn't keep curling into a little ball and turning it's back on us...).

According to http://www.babycentre.co.uk/ :

Up until now your baby has been measured from crown to rump but from this point on the measurement will be from crown to heel – and this week she is about 26cm long and is steadily gaining weight. A whitish coat of a slick, fatty substance called vernix caseosa begins to cover your baby, protecting her skin during its long immersion in amniotic fluid. It also eases birth. Your baby's swallowing more this week, good practice for her digestive system. After your baby takes in amniotic fluid, her body absorbs the water in the liquid and moves the rest into her large bowel. In her bowel, a sticky by-product of her digestive system, called meconium, accumulates. It'll appear in her first nappy after she's born.

Make sure you're eating a good diet, and are getting enough iron. Your baby needs it to make red blood cells, among other things. In fact, it's almost impossible for you to get too much from food alone without overeating. Iron-rich foods include lean red meat, poultry, fish, lentils, spinach, and iron-fortified cereals. See our eating well guide to see what you should be having in the next few weeks.