13 Weeks Pregnant Symptoms – Fetus and Ultrasound

13 Weeks Pregnant Symptoms

13 Weeks Pregnant Symptoms – Fetus and Ultrasound

We explain to you how your body develops with 13 weeks of pregnancy and how your baby is growing. Let us help you clarify all your doubts.

Week 13 – 1st day

Baby Development

Congratulations! You have reached the second trimester of your pregnancy!

Week 13 marks the beginning of the 4th month of your pregnancy (13th to 16th week).

The uterus has grown enough to make it clear that the belly is really pregnant. Even so, your baby is still quite small, about the size of half a banana. The baby is already fully formed, even fingerprinted. Enjoy this new phase of the most peaceful pregnancy, after all the most difficult part of the development of the baby is behind.

The fetus measures about 7cm and weighs around 14gr. Starting this week the baby’s weight and length will increase much faster. You’ve learned to breathe. The cartilaginous skeleton begins to turn into bones and the body grows faster than the head. The ears and eyes move to the final position. Already appeared the 27 bones of the hand, which begins to make use of the sense of touch.

The intestines, which develop inside the umbilical cord , begin to position themselves to their final position in the baby’s abdomen.

From the 13th week the skin is covered with a thin down called lanugo . This lightweight invisible cape will protect your baby from vibrations, noise and dehydration until falling, after birth.

Learn, recognize and respond to stimuli. The vocal cords are in formation. Can hear the sounds and vibrations produced by the mother’s body. Appreciate soft sounds, melodies and the rhythmic voice of the mother.

The baby’s senses at 13 weeks pregnancy


Between 14-17 weeks (4th month of gestation), the baby trains the swallowing and sucking movements so important for breastfeeding.


The nose is developed but only from the 6th month of gestation is the olfactory organs completely formed.


Between 14-17 weeks, the baby hears internal sounds, produced by the mother’s body (heart beating, digestive movements, others).


Between 9-13 weeks (3rd month of gestation), the eyelids, iris and retina are in formation.


At 13 weeks, the baby already has sensitivity to the lips. Between 14 and 17 weeks:

  • The feet and hands move and are able to grasp. With increased sensitivity, the baby reaches the hands to the mouth, kicks the fingers and plays with the umbilical cord and moves in the amniotic fluid.
  • Gain sensitivity in the palms of the hands, soles of the feet and face. If you caress the baby and massage the belly, the baby feels the pressure of his movements through the uterus.

Week 13 – 2nd day

With less nausea and more energy, you may even notice an increase in libido . Enjoy to date a lot. Remember, if there is no contrary recommendation, it is safe to have sex during pregnancy.

This quarter is the best time to start making the layette and to think about the new organization of the house.

In clothing, invest in accessories that make the difference and quit high heels and thin. Can you only think of a baby clothes and new life ahead? It’s time to organize a list with everything you will need for the baby. So you can start researching prices, stores and get a more accurate idea of ​​cost.

Week 13 – 3rd day


If you stop feeling nauseated, you may have a lion’s appetite. It is as if the body said “you need to eat more”.

But what to do to satisfy hunger without exaggerating? The main thing is to eat 6 to 8 times a day, sandwiching the main meals with light snacks. Cheese, milk, gelatin or some fruit is released. Avoid fatty and over-salted foods, and include vegetables, vegetables, and a type of protein such as lean red meat, fish, or chicken in your diet.

Remember that by controlling your weight, you are preserving not only your health but also that of the baby. Studies show that the mother’s obesity increases the risk of the child having congenital diseases related to gestational diabetes .

Week 13 – 4th day

Nucleus Translucence

If you have not yet done the Nuchal Translucency (TN) measurement, the ideal time to complete the exam ends this week. This examination is done by a specialist who can tell you whether or not the baby is developing well.

Nuchal Translucency is measured during the ultrasound performed between the 11th and 13th gestational weeks, which is usually abdominal, but if the measurement is not possible, transvaginal ultrasonography may be necessary. If there is excessive accumulation of fluid in the region of the nape of the fetus, the risk of a chromosomal abnormality, malformation or genetic syndrome increases.

It is worth mentioning that the TN does not make the diagnosis, that is, it does not give absolute certainty, but it shows an increased risk of that fetus that is with accumulation of fluid in the neck region to present some alteration.

A “risk calculation” can be performed for a number of syndromes, such as Down’s Syndrome and Turner Syndrome, through a Fetal Medicine Foundation software, if the clinic is registered, which takes into account the mother’s age, TN measurement , the presence or not of the nasal bone in the fetus, the presence of both umbilical arteries and the evaluation of the flow of the venous duct.

The calculation can also take into account results of specific hormonal tests, finally revealing a calculation of probability of that fetus being affected by a genetic alteration.

Together with the nuchal translucency, morphological ultrasonography can be performed in the first trimester, which is equivalent to the morphological examination performed in the middle of gestation , but with the advantage of being able to make a much earlier diagnosis of malformations, not necessarily of genetic origin. This examination is time consuming and examines every part of the fetus’s body, from the bones to the internal organs.

Week 13 – 5th day

Breastfeeding Signs

Your body may have already begun to make colostrum, that first supernutritive liquid that feeds the baby right after birth. Remember that a woman’s stature has nothing to do with her ability to breastfeed or give birth. The width of the pelvis relative to the baby’s weight yes, is that it will set the conditions for a normal birth. Even if you are shorter, you may have all the conditions for a normal birth and to breastfeed your child.

Those who have inverted nipples or have already had mammoplasty (breast reduction surgery) may have greater difficulty in breastfeeding, but these are not definitive factors of failure. Working the inverted nipple early with massages may solve the problem. In mammoplasty, often the ducts through which milk and nerves flow around the areola are severed, making it difficult to lower and excrete milk.

Week 13 – 6th day

Breastfeeding and Silicone in Breastfeeding

It’s likely, but it depends on the type of surgery you did. Cuts performed under the fold of the breast or through the armpits usually do not give problem. Already incisions around the areola can be more complicated, because of ruptures or damage to the nerves.

Nerves are essential to breastfeeding because they tell the brain to release prolactin and oxytocin, two hormones involved in milk production. The chances of breastfeeding also increase if the duct system inside the breasts is intact.

Solution: Be sure to discuss your prosthetics with your baby’s pediatrician because he or she will need to monitor your child’s breastfeeding and weight gain more closely to make sure he or she is well fed.

Week 13 – 7th day

Gesture and Health

It is normal to have a greater amount of vaginal discharge during pregnancy. Most of the causes are benign. This mucus, which looks milky and has virtually no smell, is caused by increased blood flow in the vaginal area. It is not much different from the type you had before you became pregnant, but the volume is much larger. Talk to your doctor if you experience the following symptoms:

  • unpleasant or fish-like odor
  • yellowish, greenish color
  • brown color similar to coffee grounds. It may be a slight bleeding
  • too thick or carved appearance
  • sudden change in appearance or consistency of secretion.

What changes in your body at 13 weeks of pregnancy

Your weight gain is already evident. If you did not overweight, you should have gained a maximum of two pounds , given that much of this increase will be net . The tendency to retain fluid is due to a water imbalance caused by hormonal changes.

Tissues retain more water. The feet and swollen ankles are one of the most obvious symptoms of this water imbalance. In general, they are temporary disorders but easily eliminated through an improvement in blood circulation. Reducing salt in food , not sitting seated for more than two hours, not wearing high heels and tights, are some of the measures that can help you lessen the retention problem .

Your chest also changes the breasts are enlarged, the aura of the breast and nipples darken, and the superficial veins become more visible through increased blood flow. Have you suffered the typical discomforts of early pregnancy? It is likely that during this period they will tend to decrease enormously or even disappear altogether.

The morning sickness and the typical nuisances of the first trimester begin to soften. Enjoy the next 3 months to live your full pregnancy!

Drink lots of water throughout the day and stay well hydrated. The streaks , grooves and marks on the skin that result from abnormal stretching of the tissues and can be avoided if you keep your body in shape, drink plenty of water and moisturize your skin every day.

The pressure exerted on the uterus by the baby tends to decrease. As a consequence, the frequency of going to the bathroom also.

You may feel tired, with headaches and a break in tension. If these symptoms become disabling, talk to your doctor.

Tips of Pregnancy

Have you been to the optometrist or ophthalmologist since you became pregnant ? Your recent hormonal balance may cause a reduction in visual capacity, a temporary problem that is resolved after childbirth . There is no scientific evidence linking pregnancy with permanent vision problems, just as it is false that breastfeeding worsens myopia. However, if possible, it is advisable to consult an ophthalmologist or optometrist and perform a thorough examination, since, after the baby is born, you will certainly have little time to devote to yourself.

Begins the calmer step of pregnancy . The nuisance symptoms of the first trimester are disappearing, but you should continue to be careful about your diet.

What can you plan for this week?

Have you already chosen the name for your baby? Personal taste, influence of friends and family, homage, … There are many factors that condition the choice of name. Before doing so, you may want to consider some aspects such as:

  1. The traditions of your family, the names ” fashionable “, your personal taste
  2. The harmony of the name with the nicknames. Beware of tongue-twisters and monotonous rhythms. Look for proper names that value family nicknames
  3. If you like truly unique names, take a look at names at the bottom of the table of names that can be registered (31-03-2017, Portugal)
  4. Keep an open mind about suggestions from family and friends. Do not let them decide for themselves but do not totally ignore them
  5. Choose a name that suits you. If you were to start your life today, knowing everything you know about the world, would you like to have the name you are thinking for your child?

The 3 trimesters of pregnancy

Each trimester is defined by the development of the fetus and that, therefore, they are not always strictly the same.

The first trimester is the first 12 weeks of development of the fetus, starting from the probable date of conception, starting after the second trimester ending at the 26th week and finally the third trimester at which the baby matures the functions of its organs, gains weight and prepares to be born.

Varicose veins in pregnancy

During pregnancy, the production of increased blood volume puts additional pressure on the blood vessels, especially on the veins of the legs. In addition, the growth of the uterus presses the veins of the pelvic area.

At this pressure is added the relaxing effect on the blood vessels produced by the hormones giving rise to varicose veins or worsening discomfort in the legs.

The symptoms of varicose veins include pain, which can be mild or intense, feeling heavy or swollen legs, the appearance of thin blue vessels visible on the skin.

How to increase comfort:

  • Avoid being in the same position for too long, standing or sitting. Move whenever possible to facilitate blood flow
  • Flit your ankles once in a while
  • Avoid crossing your legs when sitting
  • Use a stool on the desk to slightly raise your legs when you need to be working sitting
  • Sleep facing the left side, the best to favor circulation
  • Be aware of weight gain in addition to what is recommended by your doctor / nutritionist
  • Avoid lifting weights
  • Wear resting or elastic stockings, depending on the degree of severity of the problem
  • Avoid tight clothing
  • Exercise (talk to your doctor about the type and frequency of exercise you can do)
  • Eat foods rich in vitamin C that helps keep blood vessels healthy and elastic
  • Take a shower with warm water and take a shower with the coldest water to take to activate the blood circulation
  • Seek medical help when symptoms worsen or if there is a family history of varicose veins. Do not self-medicate

Pregnancy Week by week

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