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Fourth Month of Pregnancy

When you are in the fourth month of your pregnancy, then you are in your second trimester. Week 13 is representing the beginning of the second trimester. This is a stage where fetal development takes on a whole new meaning. During the second trimester, parents are able to find out the gender of their baby. [1] The mother–to–be may even feel the baby move. If you have been feeling sick and tired with the morning sickness, then you will probably start to feel better, because you are 14 weeks pregnant.

If you are feeling the urge to pass urine more often than the last few months, then this is happening because your womb is pressing your bladder and other changes in circulation happen. This should ease in the fourth month of pregnancy, but you will still pass more urine than is usually normal. If you have noticed any pain when you urinate, then you should talk with your doctor. [2]

Urinary infections can happen in the pregnancy and this is a reason why you need to treat them quickly, so you will reduce the risk of kidney infections. [2] Headaches can happen more commonly during the pregnancy, but if they are severe or distressing, then they can be a sign of something more serious. You need to take extra care of your gums and teeth during pregnancy. In the fourth month, you can experience more intense hunger pangs than you did before, but you need to try to maintain your healthy pregnancy diet. [3]

You need to follow your doctor’s recommendations and you can add just a little more healthy food to your diet, which is better than eating two big meals. In the second trimester, you have more energy and your tummy is not so big. You can use this fact to go on vacation with your partner. But, before you go on a trip, you need to consult with your doctor, so you will be sure that your health and the health of your baby are at optimal levels.

If this is your first baby, then your chances of spending more time with your husband on vacation are big, because you do not take care of other children. You need to quit smoking if you are a smoker because this bad habit can harm your baby, so do not risk his or her life. [4]

Fourth Month of Pregnancy

Fourth Month of Pregnancy

The mother’s body:

Pregnant women who have experienced tiredness and nausea will probably start to feel better around the beginning of the second trimester. Some women can begin to feel an increase in their sex drive, which is a result of pregnancy hormones or an increase in the blood flow to the pelvic region. But, it is perfectly normal not to experience these feelings.

The mother will notice a small bump developing in the abdomen as the womb grows and rises upwards. By the 16 weeks of pregnancy, the mother will be able to feel her baby’s first light movements. But, these are still early days, and more common for these fluttering movements to be felt later.

Your pregnancy week by week: Weeks 13 – 16:

We have explained to you the fourth month of pregnancy, so you can feel good when you read all the important information for yourself.

Week 13:

  • Baby: In this week your baby is growing quickly. His or her eyes are moving into position. His or her ankles and wrists are formed. The head is still disproportionally big, but the rest of the body is starting to catch up. In this week your baby weighs around 25 grams. The baby’s ovaries or testes are fully developed inside the body, while the genitals are forming outside the body.
  • Mom–to–be: In this week, your uterus has grown a lot. The uterus is filling your pelvis now and it is starting to grow upward into your abdomen. You probably feel it like a soft and smooth ball. If you have not gained any weight yet due to your morning sickness, then you should not be worried. You will begin to gain weight when you start to feel better.
  • Tip for the week: You should suggest your partner go with you to a check-up. Your partner will love the chance to hear the baby’s heartbeat.

Week 14:

  • Baby: In this week, your baby’s ears are shifting from the neck to the sides of the head. His or her neck is getting longer and the chin more prominent. The unique fingerprints and facial features are all there. Your baby is begging to respond to outside stimuli. If you feel that your abdomen is poked, then the baby will try to wriggle away. In week 14, your baby is about 85 mm long from head to bottom. From this week, your baby begins to swallow little bits of amniotic fluid, which pass into the stomach. Also, his or her kidneys start to work and the swallowed fluid passes back into the amniotic fluid as urine.
  • Mom–to–be: In this week you are probably wearing maternity clothes. Your muscles and skin start to stretch to accommodate your growing baby. You can notice some constipation because pregnancy hormones relax the bowel. In most cases, women gain between 10 kg and 12.5 kg. But, if you gain too much or too little, then it can cause health problems for you or for your baby, so listen to your doctor’s advice.
  • Tip of the week: You should try to ease constipation by eating a lot of fluids and vegetables, drinking plenty of fluids, and making moderate exercises.

Week 15:

  • Baby: In this week, your baby’s body is covered with very fine hair, known as lanugo, which is usually shed by birth. The hair on the top of the head and eyebrows are beginning to grow. His or her bones are getting harder and the baby may even be sucking his thumb. Around this time, your baby will start to hear. They may hear muted sounds from the outside world and any noises that your digestive system makes, as well as the sound of your heart and voice. Also, his or her eyes will start to become more sensitive to light. Even though your baby’s eyes are closed, they can register a bright light outside your tummy.
  • Mom–to–be: You can feel your uterus about 3 – 4 inches below your navel. In the next five weeks, your doctor will offer you a blood test, known as the quadruple marker screening test, which can help to screen for Down syndrome. Also, your doctor may offer you amniocentesis, which tests a small sample of amniotic fluid withdrawn by an ultrasound-guided needle, between 15 and 18 weeks. You can talk with your doctor if you want to make some prenatal tests.

Also, it is normal to have more vaginal discharge in the pregnancy. Usually, it is clear, thin, or milky white and it should not smell unpleasant. If your vaginal discharge is smelly, you feel sore or itchy, or you have pain when you pee, then you need to talk with your doctor as soon as possible because this could be a sign of an infection. You can have a backache in pregnancy because your womb gets heavier and your pregnancy hormones affect the ligaments in your body and this can put a strain on your lower back.

  • Tip of the week: You should start learning to sleep on your left side because your circulation is better in this way. Also, you can try tucking pillows behind you and between your legs. You can find some pregnancy pillows which will support your entire body.

Week 16

  • Baby: When you visit your doctor for a check-up, you may be able to hear your baby’s heartbeat. The fine hair, lanugo, might be growing on the head. His or her arms and legs are moving and the nervous system is working.
  • Mom–to–be: In the period of the next few weeks, you may start to feel that your baby is moving and this is known as quickening. This often feels like a gas bubble or subtle fluttering movement. When this happens more regularly, then you will know that it is your baby. Also, your body is changing in many other ways. The increased blood volume to support your growing baby may produce nosebleeds and you can notice that your leg veins are becoming more apparent. Your uterus is shifting, so you may not have to urinate so much.
  • Tip of the week: If you noticed that your leg veins bulge, then you can wear support stocking. You can put them on your feet whenever you can and it is important to exercise, so you will improve the blood flow.

What is happening inside you:

The fingers and toes of your baby in the fourth month of pregnancy are well–defined. His or her hair, nails, eyelashes, eyebrows, and eyelids are formed [5]. Bones and teeth become denser. Your baby can make faces, stretch, yawn or she can suck the thumb. In the fourth month of pregnancy, the reproductive organs and genitals of your baby are fully developed. Your health – care provider can see on ultrasound if you are having a boy or girl. It is not just to find the sex of your baby, so this depends on you.


[1] McFadzen M, Dielentheis DP, Kasten R, et al. Maternal intuition of fetal gender. Journal of Patient-Centered Research and Reviews. 2017;4(3):125–30. doi:10.17294/2330-0698.1454

[2] Matuszkiewicz-Rowińsk J, Małyszko J, Wieliczko M. Urinary tract infections in pregnancy: old and new unresolved diagnostic and therapeutic problems. Archives of Medical Science. 2015;11(1):67–77. doi:10.5114/aoms.2013.39202

[3] Negro A, Delaruelle Z, Ivanova TA, et al. Headache and pregnancy: a systematic review. The Journal of Headache and Pain. 2017;18(1):106. doi:10.1186/s10194-017-0816-0

[4] Cooper S, Orton S, Leonardi-Bee J, et al. Smoking and quit attempts during pregnancy and postpartum: a longitudinal UK cohort. BMJ Open. 2017;7:e018746. doi:10.1136/bmjopen-2017-018746

[5] Khetrapal A. Genetic regulation of fingers and toes development. News Medical Life Sciences. Retrieved from

Dr. Emil Sarsath (aka) Vijila, a licensed naturopathic doctor (BSMS) who always ensures his patients receive compassionate, and individualized care. He has extensive experience in primary care, digestive health, mental health, nervous system disorder and more.Area of Expertise – Naturopathic Medicine, Whole Foods-based Nutrition, Siddha, Panchakarma.She is always available through [email protected]


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