The second trimester of a twin pregnancy, week 13-27, will see your babies change dramatically as they mature and are growing in leaps and bounds. Most women announce their pregnancy during this time. At this time the chances of miscarriage also reduces.
During the period of the fourth, fifth and sixth months, your twins’ growth and development rate is very fast. The foetuses start looking like miniature human begins. All the internal organs of the babies start maturing as well as functioning. They develop hearing abilities by the end of the trimester, so you can start talking to them and find them responding to loud noise or your voice. The brain continues to develop. Both the babies have a heart beat that’s much faster than the normal heartbeat rate. The babies’ reproductive organs are growing and maturing. Their body will be covered by lanugo to protect their skin. Also, a protective layer develops around the babies’ skin to protect them in the amniotic fluid.
You also feel the first foetal movement during the second trimester. Gradually you are going to feel your babies move more distinctly as they grow. By the end of the second trimester, your babies are going to measure around 30cm each and weigh around 500-600g each. At this point, they are continuously fighting for position and moving around.
Their lungs are now developing and they start practicing breathing. Unique fingerprints have formed and your babies should be able to blink, kick and punch. They can also open and close their mouth by now.
With your uterus growing and stretching you will unfortunately see many discomforts return towards the end of your second trimester – such as frequent urination, swollen feet, fatigue, constipation and ligament pain. You must keep a check on your weight gain. As you are carrying twins you are obviously expected to gain more weight than a woman who is carrying a single baby. But even the weight you gain should be controlled and monitored from time to time.