Pregnancy - the Second Trimester

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You don't have to worry about morning sickness or exhaustion anymore and also don't have the pains of later pregnancy. The growth of the baby is also incredible!



As you get to week fifteen of your pregnancy, your baby's legs are now longer than their arms, their skin is extremely thin, the fingernails and toenails are growing, and the eyebrows start to grow. You may feel little bits of fluttering movements as your baby moves. Not everyone does yet though. The baby is about 3.98 inches long and weighs about 2.47 ounces.



During week sixteen, fat starts to develop under the skin, and the baby has even learned how to breathe! They aren't breathing air though, just the amniotic fluid. The baby is now around 4.57 inches long and weighs about 3.53 ounces.



When you get to week seventeen of your pregnancy, your baby will look much more human-like now. He or she is much more in proportion than before. The skeleton is changing from cartilage to bone, the umbilical cord is getting thicker, and pads are forming on the fingertips and toes. The baby is about 5.12 inches long and weighs about 4.97 ounces.



At week eighteen, a substance called vernix forms over the baby's skin. This is a protective material. Tiny air sacs start to form in the lungs and the vocal cords are now fully developed. Your placenta continues to grow in order to nourish the baby. If you have an ultrasound during this time, all the features of the heart should be visible, including all ventricles and chambers. Your baby weighs about 6.7 ounces now and is around 5.59 inches long.



When you get to week nineteen, your baby has now developed the same sleep patterns as a newborn. They actually have a favorite position and have recognizable periods of activity and rest. All the nerves in the baby's body are starting to get coated with myelin, which is a fatty substance that insulates the nerves. If you have a girl, the uterus begins to develop, and if you have a boy, his genitals are now recognizable. You can now determine the baby's sex if you get an ultrasound!



Week twenty is the halfway point of your pregnancy. Your baby is no longer growing quite as rapidly as before. Immunities are transferred from you to the baby. They can protect the baby from viruses that you've already had. The baby also begins to get startled by loud noises outside of the womb. The average length of this time is 6.46 inches and the average weight is about 10.58 ounces.



During week twenty one, white blood cells are being produced which help fight off viruses, infections, and diseases. Also, the tongue is full developed and the wake and sleep periods get to be more consistent. If you have a girl, her vagina and womb are formed. From this time on, the length is measured from the heel to the crown. Before, it was from the rump to the crown. The baby is around 10.51 inches long and weighs 12.7 ounces.



At week twenty two, your baby weighs about a pound! Your baby can also hear pretty well now and can hear everything you say or do. You can read, talk, and sing to the baby. The average length of this time is 10.94 inches.



During week twenty-three, the eyes are formed. However, the iris still has no pigmentation. Even though your baby has only a 15% chance of surviving if born now, the odds go up each day. The average baby during this stage is 11.38 inches long and weighs 1.1 pound.



Babies actually gain six ounces during week twenty four! Most of this is from muscles, bone mass, and organs. The baby's appearance looks very much like a newborn now. Taste buds also start to form now. The baby is about 11.8 inches long and weighs 1.3 pounds.



During week twenty five, the structure that make up the spine start to form, the blood vessels in the lungs form, the nostrils open, and swallowing reflexes develop. Your baby can now make a fist and even grasp objects.



At week twenty six, your baby may weigh up to two pounds! The average weight is only 1.7 pounds though and the average length is 14 inches. The baby's spine is getting much stronger and the baby's eyes open. Their eyes have been closed until now.



During week twenty seven, your baby's brain is rapidly growing. Talk to your baby as much as you can! The lungs are continuing to grow, getting ready to function out of the womb. Your baby is now around 14.4 inches long and weighs 1.9 pounds.



Week twenty eight is the last week of your second trimester. The eyebrows and eyelashes are extremely noticeable now and the hair on their head is growing longer. The eyes are completely developed now and the lungs are able to breathe. Your baby should recognize your voice now! The average baby weighs 2.2 pounds and is 14.8 inches long.



Be aware that every baby develops differently so don't be concerned if your baby is not the same as this. This just gives you a general idea about how babies grow.



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