4 Weeks Pregnant Symptoms – Ultrasound and Transformation

4 Weeks Pregnant Symptoms

4 Weeks Pregnant Symptoms – Ultrasound and Transformation


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

Week 4 – 1st day

Growth and Development

The cluster of cells – now called the embryo – that is growing inside your uterus is the size of an apple seed. It divides into layers that later on form organs and tissues.

The neural tube – from which the brain, spinal cord, spinal cord and nerves will sprout – develops in the upper layer. The heart and circulatory system begin to appear in the middle layer. At the same time, a first version of the placenta (the chorionic villi) and the umbilical cord, which carries nutrients and oxygen to the baby, are already working. See more details

Week 4 – 2nd day


Your period is late and your breasts are enlarged and painful. All due to the beginning of production of progesterone, the main hormone of pregnancy, and the blastocyst (stage of the human embryo) that was implanted in the wall of the uterus. If you do an ultrasound, the gestational sac implanted in the fundus of the uterus and the yolk vesicle that carries nutrients to the embryo. Which is not yet visible, will be visible.

Week 4 – 3rd day


This phase is very important to confirm if the gestational sac is in the right place. That is, inside the uterine cavity or if, instead, its implantation occurred outside the uterus. Which is called ectopic pregnancy , considered a medical emergency. The placenta an organ that connects its circulation with that of the embryo. Begins to take shape and clings to the wall of the uterus at the site of implantation. The umbilical cord exits on one side of the placenta. Amniotic fluid, which protects the baby during pregnancy, is forming inside this lining or membrane.

Week 4 – 4th day

Body and Health

The first four weeks are the period called “organogenesis”. That is, the formation of organs. Therefore, we must pay special attention to exposure to diseases or chemical substances. Avoid long periods in polluted places, especially where there is cigarette smoke, because although it may be indirectly aspirated, it can be harmful to you and the unborn child.

Reduction of oxygen levels, in addition to chemical components derived from petroleum present in polluted air from traffic, as well as other pollutants in the air that we aspire to, can influence both the formation of fetal organs and the placenta, as well as the incidence of respiratory diseases of the baby after birth.

Week 4 – 5th day

In pregnancy, your skin retains more moisture and becomes more moisturized. Soothing wrinkles and lines of expression. The rosy tone, especially in light-skinned women, is due to the increased amount of blood circulating in the body. The downside of this is that sometimes the coloring turns to “vermilion”.

Irritations to the skin become more visible and your face may become swollen due to fluid retention. It is no use reducing the intake of fluid to ease the swelling. On the contrary, drinking enough water in pregnancy is fundamental to health. The redness of the face will improve after the baby is born. If you want to hide it, Try using a moisturizing foundation, but never retinoic acid creams.

Week 4 – 6th day

Your Health

Stains called chloasma or “pregnancy mask”. They are caused by changes in pigmentation of the skin and can appear anywhere on the face or neck. In women with very dark or black skin, the spots may be lighter than the skin. Chloasma is caused by increased production of melanin. The hormone responsible for the tan, which protects the skin from ultraviolet rays.

Exposure to the sun leaves the spots darker. So if you have fair skin, wear sunscreen on your face every day and wear a wide-brimmed hat if you stay in the sun for a long time. If the spots are bothering you too much, try disguising them with a base. They will begin to disappear about three months after the baby is born. Folic acid deficiency can favor the appearance of blemishes. Therefore, use folic acid in foods (such as whole grains and dark vegetables) and taking a supplement (if directed by your gynecologist).

Week 4 – 7th day

Your Life

Just because you are pregnant does not mean that you are doomed to wear pastel robes or knit clothes. Black works great for future moms and is easy to match with anything.

Fashion consultants do not recommend a lot of striped fabrics horizontally. But if your favorite shirt still looks good, why not? Nowadays there are several options of stores that instead of “clothes of pregnant”, offer “pregnant fashion” for you to be beautiful!

Tips of Pregnancy

What can you plan for this week?

If you have not started taking folic acid , you will be advised by your doctor to do this supplementation. This nutrient can also be ingested through food. Get to know some foods rich in folic acid .

The iodine is another essential nutrient during pregnancy. Iodine is a trace element essential to life. Since it is not synthesized by the body, it should be obtained from dietary sources. The iodine is accumulated in the thyroid gland, having as function the biosynthesis of the thyroid hormones.

These hormones are responsible for the regulation of cellular metabolism, namely the rate of basal metabolism and body temperature, and play a key role in the growth and development of organs, especially the brain.

The Directorate-General for Health recommends the ingestion of a daily supplement of potassium iodide (150-200 micrograms) to women who are planning to become pregnant, to pregnant women and to those who are breast-feeding. [Source: Iodine – Importance for Health and the Role of Food “Directorate-General for Health, 13 December 2014]

Are you anxious to know if you are pregnant? If the menstruation does not appear on the expected date, after a week you can do a pregnancy test through the urine (it can be done before, but the result may not be reliable it may be necessary to repeat it a few days later).

Tips for your partner

The first weeks of pregnancy are particularly sensitive to embryonic development. There is a set of factors that may not be aligned and the embryo can not develop, culminating in their expulsion and often the woman ends up menstruating without realizing that there was fertilization.

If your partner suffers a miscarriage , the loss of an expected and desired baby is always a fragile time when the woman asks herself why. Right now, it’s critical to be by your side and give all emotional support so that you can try again later . Ideally, you should wait 3 to 6 months to try to become pregnant again.

4 Weeks of Pregnancy: Calm Pregnancy

Your body is prepared for a pregnancy, and usually it runs smoothly. However, particularly in a first pregnancy , you should be aware of the signs your body sends you and call your doctor if anything bothers you or feels that something is wrong with you or your baby.

Do not be ashamed to ask questions and clarify doubts, even those that seem less timely or ridiculous to you . Being well informed leaves you more calm and secure, but also alerts you to the warning signs that should lead you to seek medical help .

Weight gain in pregnancy

The recommended weight gain in pregnancy varies from woman to woman according to their pre-pregnancy body mass index and number of fetuses.

As gaining more or less weight than recommended for gestation has consequences for maternal-fetal health, weight is always monitored at each prenatal visit.

To get an idea of ​​the total weight gain (taking into account that they are values ​​that represent an average) see how the weight can be distributed during pregnancy:

  • Baby : 3.4 kg
  • Placenta : 680 g
  • Amniotic fluid : 900 g
  • Uterine expansion : 900 g
  • Maternal breast tissue : 900 g
  • Maternal blood volume : 1.8 kg
  • Liquids in maternal tissues : 1.8 kg
  • Maternal fat reserves : 3.2 kg
  • Total on average: 13.5 kg of weight gain (all weights are approximate).

To alleviate nausea, it is best to drink sparkling water, eat lots of yogurt, drink lemon balm infusions, have breakfast in bed, and allow yourself at least a half hour rest before getting up.

Pregnancy Week by week

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