The 1st Week of Pregnancy

Feelings during the first weekEmbryo development
Symptom of pregnancyDetermining the exact date
Possible problemUseful tip

Feelings during the first week of pregnancy

Our pregnancy calendar will guide you and thousands of expectant mothers through the amazing forty-week long path you will remember for the rest of your life. It will be a happy and safe road that begins on the first day of the last menstruation and ends with the long-awaited and the happiest moment of birth.

To begin with, we use obstetric weeks in our calendar, in accordance with advanced medical science. The obstetric weeks are usually counted from the first day of the last menstruation, while the fetal weeks of the “delicate condition” refer to fertilization as the starting point.

You can find out from our calendar what happens in your body during the first week of pregnancy and at each new stage; learn how the fetus develops and grows; get helpful advice; see encouraging videos; expectant moms can share the photos of their baby bumps, ultrasound pictures, impressions and symptoms. We’ll make sure that you will receive a lot of useful information.

The first obstetric week of pregnancy, as you may have figured out, precedes conception, so a woman does not have any unusual sensations.

There cannot be any signs of pregnancy during the first week according to the obstetric method. They appear 14 days later.

Fetal development

As soon as the pregnancy test shows the precious two bars, so many young girls rush to the Internet and type a search query: “the first week of pregnancy – fetus development”. They are really excited to read how their baby is doing under their heart, once they learned about their “delicate condition” and the prospect of carrying the little Miracle within themselves for the next nine months. This is the eternal maternal instinct given us by Mother Nature.

However, as we said in the previous section, the 1st week of pregnancy according to the obstetric method (not to be confused with the 1st fetal week of pregnancy, which occurs 14 days later) PRECEDES not only fertilization, that is the formation of the embryo in the future mother, but also ovulation, necessary for conception, in order for the sperm to reach the egg.

Life begins in the womb of a young woman only between the second and third obstetric week of pregnancy.

If you are really eager to learn about the development of the fetus inside you and to see how it looks, you’d better write “the development of the fetus in the 1st fetal week of pregnancy” in a search engine.

Signs and symptoms of pregnancy in the first week

According to the weekly (obstetric) reference system chosen by our calendar, oddly enough, there is no pregnancy itself in the first week of pregnancy; it is rather a cycle in the female body that is favorable to prepare for conception and, as a result, for pregnancy. However, it’s the best time for the mom-to-be to learn some useful information about the symptoms of pregnancy in the 1st week after conception.

So, the first week of pregnancy is characterized by the following signs and symptoms:

1. It is totally fine for the expectant mother to feel sickish and have symptoms similar to a cold, but without fever.

2. During the day, the mood can change drastically several times, for example from tears to laughter. Hormones in the female body lead to mood swings in the short time.

3. Sleep disturbances may appear. The girl may wake up unjustifiably early and then feel sleepy the whole day. The lack of sleep amplifies the sickness mentioned in the first paragraph, adding weakness and fatigue.

4. There is a chance for the pregnant woman to feel heaviness in the lower abdomen. This is due to the fact that the blood flow to the uterus intensifies.

5. In addition, the expecting mother may suffer from headaches of varying intensity and severity.

6. Increased sensitivity of the mammary glands may manifest in painful contact.

7. Many pregnant women notice an increased appetite at this stage of pregnancy.

8. There is a chance of an early pregnancy sickness, expressed by short-term nausea in the morning.

9. Desire to urinate may occur more frequently.

10. There is a small chance for the girl to feel discomfort in the lower back during this period.

It doesn’t mean that all ten of the listed companions of early pregnancy will immediately attack you after fertilization. Absolutely not. Every female body is unique.

Most likely, in the 1st week of pregnancy after conception, you will notice only mood swings and painful sensation when touching your breast. And everything else will come by. You should hope for the best and prepare for the worst. Never ever program yourself that all these symptoms and signs will crash onto you. Keep your mind positive!

Remember that at any period of pregnancy, it is very important for the expectant mother to be in a comfortable psychoemotional state. Don’t think about bad things, don’t get involved in conflicts, avoid stress and intense feelings. Everyone should add to a positive mood of the pregnant woman: her spouse, parents, close relatives, friends, neighbors, colleagues, and doctors, all of them.

Determining the exact term

On the first obstetric week of pregnancy, as we have repeatedly said above, sexual intercourse between future parents with the aim of fertilizing the egg has not yet happened. In fact, the pregnancy has not yet begun. Your local gynecologist, most likely, will be able to professionally and competently estimate the exact term when you go to the women’s health clinic to get registered.

Now let’s repeat the sequence of events and the corresponding weeks of pregnancy according to the obstetric reference system.

For this purpose we are going to use a numbered chart. The number indicates obstetric week of pregnancy.

1. The menstrual cycle of the expectant mother.

2. Ovulation in the female body.

3. Fertilization of the egg during sexual intercourse between future parents.

4. The fertilized egg moves along the fallopian tube, dividing from zygote into blastocyst, and implants into the endometrium of the uterus.

5. A simple HCG pregnancy test shows two bars.

6. Formation and development of the fetus.

Fetal ultrasound in the 1st week of pregnancy

As you can see from the chart above, there is no point to do the fetal ultrasound during the first obstetric week of pregnancy, before fertilization and conception. However, ultrasound makes sense in the first fetal week of pregnancy (corresponding to the third obstetric week) to confirm the pregnancy.

Abdominal tenderness

Abdominal tenderness is a common symptom in early pregnancy. Of course, it doesn’t occur in the first or second obstetric week, but somewhat later. The uterus gets more blood and grows actively week, applying increasing pressure on the bladder and other internal organs. In the first week, the only possible abdominal pain is menstrual cramps.


In the first obstetric week of pregnancy, at the very beginning of your happy journey to motherhood, there can be no early pregnancy sickness or nausea, because fertilization has not yet occurred. The woman’s body is only preparing for its “delicate condition”. If you feel nauseous at this time, this is not a sign of pregnancy, but most likely a consequence of any problem in the digestive system.

Mood swings

There should be no mood swings in the first obstetric week, corresponding to the start of the first trimester of the pregnancy and the very beginning of the first obstetric month of pregnancy. Unless it is natural for this particular girl at the beginning of the menstrual cycle.

Mood swings in early pregnancy are usually caused by hormonal changes in the body of the future mother.

Of course, they cannot begin until fertilization, that is, until the moment when the pregnancy has actually occurred.

Many women in early pregnancy are prone to this psychological problem. During the day, they mood changes dramatically several times: from tears and sadness to incredible happiness and laughter. This is how the new hormones in the body of the expecting mother prepare her for a new status and fortify her psychological immunity, according to the laws of Nature.

Lower productivity

In the early stages of pregnancy, expectant mothers may experience a decreasing productivity. This can be caused by sleep disturbance, weakness, fatigue, lack of sleep, mood swings, sometimes all sorts of phobias and fears typical for the pregnant women. It is perfectly normal.

Both physiologically and psychologically, a woman has to adjust and prepare for her new status of a mother, the most important person in the life of a future child, who is responsible for his health, well-being and happiness.

In order to remain productive and not to disrupt your routine rhythm of life, it is very important to resist bad thoughts, fears and unnecessary worries. Please, do your best to stay optimistic and positive!

Possible problems

As we said, in the first week of pregnancy according to the obstetric method, which we chose in our calendar, pregnancy did not actually occur. The woman is still menstruating. After that, the egg matures, and only then (in 12-16 days) it is fertilized. Therefore, it makes no sense to talk about possible problems of the first two weeks. It is better for the future mother to prepare for possible problems of early terms of pregnancy.

The key word here is “possible”. There is no guarantee that all of the above or even a part of this will affect you. Each organism is unique.

It’s highly likely that the following symptoms will never bother the pregnant girl.

The hypothetical problems of early pregnancy include:

1. Thrush during pregnancy, accompanied by itching and cottage cheese-like discharge.

2. Pregnancy sickness, accompanied by nausea in the morning, poor appetite and unwellness.

3. Missed miscarriage, the probability of which is extremely small, if you follow all the recommendations of specialists.

4. Frequent urination due to the fact that the growing uterus puts pressure on the bladder.

5. Constipation.

6. Spontaneous abortion, or miscarriage, which is also extremely rare when following all the rules at the planning stage of pregnancy and the actual bearing of the child.

7. Mood swings.

8. Sleep disturbances, lack of sleep, weakness and fatigue.

Being positive is really important. We have listed what may happen to the pregnant women in the early stages. Warned is armed! The birth of a healthy child depends largely on the positive attitude and optimism of the expecting mother!

Useful tips and tricks for the future mother

Inside a woman, the birth of a new life is coming, and the measures taken to preserve her health in this period are more important than ever. That is why it’s important to know what you shouldn’t do during the first week of pregnancy. If you haven’t figured this out before, start right now, and this will definitely have a beneficial effect on your future baby.

1. Probably the most important thing is to prevent all kinds of toxic substances from entering the body. That means no smoking and drinking in the first weeks of pregnancy.

2 All medications that the woman has to take must be approved by a doctor. Everyone knows that many drugs can cause irreversible processes in a woman’s body, so you must not take medication without the permission of a doctor.

3. Try to avoid X-ray examination of the abdominal organs. This is only acceptable in the event of an emergency!

4. Stressful situations jeopardize the health of the expecting mother, so it is advisable to solve all the emerging problems peacefully. Don’t fight with your loved ones; don’t conflict with your colleagues! It’s much better to create a cozy romantic atmosphere at home with your husband, because sex in the first weeks of pregnancy not only helps you to relax, but also improves the intimate relationship with your spouse.

5. Avoid contact with sick people as much as possible. It’s important to dress warmly in cold weather and to stay safe from colds and other diseases that can cause fever, which is a really bad thing in the first weeks of pregnancy. The best means to prevent colds in the first weeks of pregnancy are well-known onion and garlic.

6. It is recommended to take vitamins since the first weeks of pregnancy to strengthen the immune system and supply the body with lacking microelements. But don’t forget about proper nutrition, which is very important. The diet must include vegetables, fruits, cereals, and dairy products. It is crucial to pay attention to the content of folic acid in products, which helps to prevent birth defects and ensures the normal fetal development.

Diet for the expecting mother

The nutrition of the expecting mother throughout the pregnancy in general and in the early stages in particular should be varied, balanced and healthy. You’ll have to give up smoked, spicy, fried food. Preference should be given to steamed, stewed, and boiled dishes. More fresh vegetables and fruits, herbs and berries. It is advisable to keep away from fizzy drinks (lemonade, Pepsi and cola). Go easy on coffee, chocolate, citrus fruits and honey (products with a high risk of allergies). To avoid pregnancy sickness, it is better to eat smaller meals more often, five to six times a day. Eat more dairy products – a source of calcium, boiled meat and seafood – a source of protein.

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