The 3rd week of pregnancy – Familiarity with the early signs of pregnancy (School of Reproduction & Motherhood)

The third week of pregnancy is associated with the onset of early pregnancy symptoms. Breast numbness, tightness and pain in the abdomen, spotting, weakness and fatigue, nausea, etc. are the most important symptoms of pregnancy.

This week, your baby is still a mass of hundreds of rapidly proliferating cells. The size of this cell mass, which bears no resemblance to humans, is 0.1 mm, equivalent to a needle. The fetus is in the blastocyst stage, where the placenta begins to produce HCG (human placental gonadotropin), a hormone that can be detected in your urine or blood. 

Let’s learn more about how your baby is growing in the third week of pregnancy and week by week during pregnancy, and take a look at the early and early signs of pregnancy and the need to choose the right doctor.

What are the symptoms of pregnancy?

The early signs of pregnancy are difficult to detect. In this section, we provide information about the early signs of pregnancy and home pregnancy tests. In addition, it is better to choose a good way to announce your pregnancy to your spouse.

What are the first signs of pregnancy ? Although many of these symptoms may occur at any time at the end of your period, these symptoms can also be a sign of pregnancy. Do you feel tiredness and muscle pain in your abdomen ( cramps )? This, along with some signs of pregnancy, can indicate that you are pregnant (even before your period is delayed).

Do you doubt whether there is news about the baby or not? Examine your body carefully! And if you’ve seen some of these symptoms (in case your period is delayed, of course), it ‘s probably time to go to the pharmacy or see a gynecologist.

Hormones in your body begin to function almost immediately after fertilization. These hormones cause very subtle changes in your body, even before your pregnancy can be detected by home pregnancy tests. Unfortunately, many of these symptoms, such as numbness in the breasts and bloating, also occur just before menstruation (a very sure sign that you are not pregnant!); Therefore, determining pregnancy at this stage is more based on speculation and can not be relied on until the test is performed. In the following, we will examine other pregnancy symptoms.

1. Breast numbness

Breast anesthesia is one of the most common symptoms of pregnancy. Breast tissue is very sensitive to hormones. When the hormones progesterone and hCG are released into your body after fertilization, they increase the amount of blood flowing in your arteries, causing your breasts to swell and feel heavier than before.

2. Cramps and pain in the abdomen

You may feel pain in your abdomen, similar to what happens to you before your period starts; But it can be a sign of pregnancy and infertility (when a fertilized egg attaches to the wall of the uterus). The uterus in this case may be slightly stretched to prepare for the severe expansion over the next nine months.

3. Spot stain

Many women may experience spotting and confuse a slight bleeding with their period, but about 25% of women experience spots in the early stages of fertilization. If you have recently felt that your period is much shorter than usual or different from normal, this could be a sign that you are pregnant.

4. Weakness and fatigue

If the only thing you think about at work is napping or you are too tired to go about your daily activities such as exercising and this situation is different from your usual fatigue, this fatigue can be one of the early signs of pregnancy. Even in the early stages of pregnancy (just two weeks later), your baby begins to use up the calories your body receives, which can quickly deplete your body of energy storage and cause you to feel weak and tired.

5. Darkening of the nipples

Do your breasts look a little different lately? Pregnancy hormones affect the activity of melanocytes, or color-determining cells, in the nipple. Women with darker skin tones may notice this change later (around the 10th week).

6. Nausea

Although the main morning sickness (which affects about 85% of pregnant women) does not occur until a few weeks later, some women may experience a slight increase in sensitivity to movement. This phenomenon may be accompanied by nausea from studying in the car or discomfort and nausea during flight.

7. Blowing

Having trouble wearing your skinny pants? Increasing the hormone progesterone in the body slows down your digestive system and this causes your abdomen to swell. This phenomenon can also be seen during PMS , but the swelling stops with the onset of menstruation and a decrease in progesterone levels. If your bloating is still persistent and your period is delayed, it is time to go for a pregnancy test.

8. Increased frequency of urination

An increase in the number of visits to the toilet may be due to an increase in the function of your kidneys during early pregnancy. Your kidneys need to remove harmful fluids from your body more efficiently during pregnancy. (It also occurs in the last months of pregnancy, but this time it is due to the pressure of your growing uterus on the bladder.)

9. Food cravings

At this stage, your body is more inclined towards large sweets than pickles. In fact, in the face of a sudden increase in calorie intake, your body seeks to absorb more carbohydrates and compensate for this calorie deficiency in order to maintain energy levels.

10. Headache

Increased blood volume in the body may cause mild headaches in the early months of pregnancy. But this decreases over time and the body adapts to the increase in hormones.

11. Constipation

The same hormones that cause inflammation cause this problem in you. Due to the slowing down of your digestive system, the passage of food and its digestion also occurs less quickly. Unfortunately, this complication is exacerbated by the progress of your pregnancy.

13. Changing moods

As HCG levels rise , you will experience extreme tiredness, which will expose you to sudden mood swings.

13. Basal body temperature

Calculating basal body temperature (the temperature of your mouth in the first few hours of waking up in the morning) is commonly used to determine when you ovulate. This temperature is usually about half a degree (or slightly higher) when the fertilized egg is released into the fallopian tube and continues until menstruation. If you are recording changes in your basal body temperature and have noticed that the temperature has not decreased over a period of more than two weeks, you may be pregnant.

Other body changes in the third week of pregnancy

The sex and all the hereditary and genetic characteristics of your baby (such as eye color, hair color, skin and body shape) are determined at the time of fertilization. Your growing baby now has 46 chromosomes, 23 of which he received from you and 23 from your spouse. These chromosomes determine your baby’s gender and characteristics, such as hair and eye color, and to some extent your child’s personality and intelligence.

The fertilized cell ball (embryo) continues its journey inside the fallopian tube after fertilization and hides inside the uterine wall to feed. If your child is a twin, it has happened so far. Heterogeneous twins occur when two separate sperm fertilize two different eggs at the same time, in which case each baby will have a separate pair and amniotic sac. But if a fertilized egg divides and forms two identical embryos, it results in identical twins. Identical twins are common in pairs but usually have separate amniotic sacs.


Now, if you are sure of your pregnancy, you should wait for the birth of your beloved child by having a diet and avoiding any substances that are harmful to the fetus.

Important points of pregnancy in the first weeks

Find a good doctor for yourself. Having a health professional with whom you feel comfortable and trusted is crucial. Ultimately, this is the person who guides you through your entire pregnancy, labor pains, and births, answers your thousands of questions, and accompanies you through many emotional moments and experiences. If you have not yet chosen the gynecologist you want, it is time to use the advice of friends, family and colleagues to choose the doctor you feel comfortable with. Your choices are not limited to obstetricians; You may want to choose complementary or even alternative care methods such as midwives or GPs.

We are happy you’ve decided to study motherhood beyond all other intellectually attractive career related subjects. Please do not hesitate to ask us any related questions. We can help you with your condition puzzles, relieving from complicated life situations, medical support, prevention of common spread young age infertility or build up individual coaching or reproductive stimulation protocol, or simply talking when you cry or laugh. Stay close to us we will show you a shining grace within you as the child of Mother Nature.