20 Weeks Pregnant Belly
Your baby weighs about 10 1/2 ounces now. He's also around 6 1/2 inches long from head to bottom and about 10 inches from head to heel – about the length of a small banana . (For the first 20 weeks, when a baby's legs are curled up against his torso and hard to measure, measurements are taken from the top of his head to his bottom – the "crown to rump" measurement . After 20 weeks, he's measured from head to toe.)
Congratulations, you are now officially half way through your pregnancy. Although the average length of gestation is 40 weeks, it is still considered within a normal range to deliver 2 weeks either side of this. Try not to set your hopes on your due date as a guarantee that you will have your baby on this precise day. Your expected date of delivery is intended as a guide to plan towards, nothing more. If you have had an irregular menstrual cycle or are unsure of when you conceived, an ultrasound can give a fairly accurate estimate of your baby’s maturity and gestation.
The top of your uterus is now at the same level as your belly button. You may have gained around 8 to 10 pounds by this point. Expect to gain ½ a pound to one pound (.23 to .45 kg) per week during the rest of your pregnancy.
The fetus continues to develop actively on the 2oth week of pregnancy. The fetus moves, spins, yawns, turns over and, from time to time, pulls the umbilical cord. The skin is formed out of 4 layers. The oil gland produces the grease that fills in all the creases on the skin of the fetus.