Updated: 7 August, 2019

Hi, welcome to Vitalhealthrecipes. We’ll be talking about what happens to you in the third month of your pregnancy in this post. Stay tuned.

You are three months pregnant. You are officially in the last month of the first trimester. I know the feeling is awesome. The belly is now undergoing major protrusion. In this post, you will learn what happens in the third month of pregnancy, some precautions that you should take and what to expect from your body and your baby.

Third Month of Pregnancy: 

9th week of your pregnancy 

In the 9th week of your pregnancy, the baby would have grown to the size of a peanut (measuring about 1.2 inches in length). The head is now erect, and the neck is more developed. In addition, the fingers and toes are now well distinct. Cartilage and bones will continue forming. Few days to the end of the 9th week, the construction of the heart will be complete. The tongue and larynx will start forming and by the end of this week, your baby will start swimming around a bag of fluid.

Starting from this week, you will begin adding weight, and you will need to eat foods rich in calcium. Your baby needs it and so do you. 

10th Week of your pregnancy 

In this week, the embryo is still small but acts and looks like a baby. The arms and leg are now longer and can bend the elbow towards the knee. In this week, your unborn baby is now called a fetus. All major organs like the muscle, neck, fingers, ears and nose are now in place and beginning to function. The jaws are now in place too. The mouth cavity and the nose are tightly joined.

At this point, your baby now has a fingerprint and is now forming testicles or ovaries, depending its gender.

Your baby will weigh 0.07 ounce (2gm), and the baby is now forming testicles or ovaries.

As each week passes by, your uterus grows larger with the baby growing inside it. You will need to change your dresses as some of them won’t fit you anymore. 

11th Week of your Pregnancy 

This week is another big growth week. Your baby now has twenty little set of teeth (milk teeth  ). The brain is growing fast and producing over 250,000 nerve cells every 60 seconds. When your doctor uses a Doppler stethoscope on you, s/he can hear the rapid humming sound of the baby’s heartbeat. Since the child’s blood is oxygenated through the placenta, there will be an opening in the atrium of the heart and the presence of a bypass valve to divert much of the blood away from the lungs.

Your baby’s genitals are developing, but the sex can’t be determined yet until it has developed properly.  By this time, the placenta has developed enough strength to produce the needed hormone for the baby. Your baby’s eyelids have fused shut and will open around week 27.

By the end of this week, your baby will weigh close to 0.18 ounce (5g), the size of a small plum. 

12th Week of your Pregnancy 

You are now 12 weeks pregnant. Cheers to that. Using a Doppler monitor on your tummy, you can hear the heartbeat of your baby. Isn’t that awesome?

Your baby now has a nose, chin, and a facial profile. At this stage, your baby’s vocal cord is now complete. Your baby can now cry – silently. The brain is fully formed which means the baby can also feel pain.

To protect the delicate optical nerve fibers, your baby’s eyelid will remain shut till the seventh month. Also, your baby has grown hairs and fingernails.

The pancreas is functioning and producing insulin, and your baby can even suck his thumbs and get hiccups.

Your baby is now about 2.5” (6cm) length and weighs about 0.7 ounce (20 g). 

Important things you need to do during your third month of pregnancy. 

Diet: You need to take care of your body for the benefit of you and your baby. Stay hydrated to combat constipation and hemorrhoids. Eat balanced meals containing fiber and protein. Your baby needs it for better organ development. 

Hormone changes: At this point in your pregnancy, you will notice frequent mood swings. You may find yourself getting angry for no just reason. Make sure you are in a happy environment. You can listen to soothing music and try to interact with others. Loneliness is not beneficial at this point. You can talk to your doctor about the worries and anxieties for further assistant. 

Dizziness and fatigue: You are going to be more tired this month, so you need to get a lot of rest when possible. Taking a short nap during the day will help you stay relaxed. 

Exercise and hygiene: it is a must for you to exercise. Make sure that you do your exercise under the supervision of a trained specialist. To control your thoughts and worries, you should try yoga and meditation. 

Personal hygiene: As the uterus keeps enlarging, you will start having more vaginal fluids. Make sure you keep your vagina clean and healthy at all times. This will reduce the risk of getting infected. 

Notable changes in your body during your third month of pregnancy:

  1. Your nipples will get bigger and darker. Time to change your bra.
  2. Due to the changes in hormone, abdomen size, you will start seeing some stretch marks.
  3. From this month, you will start to gain weight. Try to maintain a healthy diet.
  4. You might experience some gum bleeding. This is due to the hormonal imbalance.
  5. During this time, you might feel dizzy; try to sit when you feel dizzy.
  6. Your abdomen will continue to increase rapidly from this month. This is a good sign, and the risk of miscarriage will drop considerable.
  7. Due to the baby’s weight in the front, you will feel heavy back ache. This is natural and it’s your body’s way of supporting the baby’s weight inside you.
  8. Make sure you visit your doctor regularly and relay any inconsistency in regards to your health. 


As you conclude your first trimester, you will agree that the pregnancy journey is a thrilling experience. Though you will have to battle with the enormous changes, your body goes through but don’t forget the moments of joy and exciting feeling that accompanies it. Experience your pregnancy with a positive outlook as this is the beginning of many wonderful journeys. Welcome to the second trimester.

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