3 Weeks Pregnant – Signs, Symptoms and Embryo

3 weeks pregnant

Now you are 3 weeks pregnant. This crucial week transforms your pregnancy from the stage of “planning” into the real existence. If fertilization has not occurred at the end of the second week, the third week – is the most favorable time for conception. In theory, ovulation should occur on the 12-14th day.

The 3d obstetric week of pregnancy – is an extremely important period, because this is when an active development of the fetus starts together with the migration of the egg, which aims to get into the uterine cavity as soon as possible and permanently settle down there, attaching to the wall.

In addition, the 3d week of pregnancy (obstetric) – is a period of division of the fertilized egg, consequently, an expectant mother can become pregnant with twins and sometimes triplets. Of course, even one baby – is a great joy for parents, and a multiple pregnancy – is a double or even triple happiness for the whole family, though it causes some difficulties and requires a careful medical supervision.

3 Weeks Pregnant: Signs and Symptoms

dizzinessThere are no strongly marked changes in the body at this stage, but many moms can observe some symptoms, which are in many ways similar to the symptoms of PMS. Being 3 weeks pregnant, some women may have slight discharge, which is not dangerous either for the mother or the fetus. Therefore,  the symptoms of pregnancy are often confused with coming periods.

Being 3 weeks pregnant, women often observe the following symptoms: dizziness, drowsiness, a nagging pain in the abdomen, a slight swelling of the breasts.


The gestational age is still very small, just a few days. During this period an expectant mother doesn’t feel any changes happening. However, some women say that they feel the moment of the birth of a new life. Perhaps these feelings are caused by a continuous expectation of the first signs of pregnancy, if it is planned and long-expected. But many expectant mothers do not even know about their situation up to 5-6 weeks.

What is happening inside of you?

3 weeks pregnancyThe 3d week of pregnancy – is the first week of life of your fetus. After the ovulation the egg had only 24 hours to meet with sperm in the fallopian tube. If this does not happen in time, it will lose the ability to fertilize.

Therefore, the most significant event of the 3d week of pregnancy is considered to be fertilization itself. In the early days of this week the zygote is still in the cavity of the fallopian tube, which is not yet attached to its wall. It continues its ongoing movement towards the uterus. As for the fetus, it is fed with the proteins, released by the glands of the fallopian tubes, and with its own energy reserves. Having moved into the uterine cavity and having got into it’s inner shell, the embryo begins to plunge into the uterine wall, into the endometrium layer. This process is called implantation. If everything goes well, by the end of the third week the embryo is firmly anchored in a favorable and nutrient environment – in the endometrium layer, and from this moment the durable and multilateral relations between the mother and the fetus set.

3 Weeks Pregnant Ultrasound

At this stage it is possible to determine the uterine pregnancy using a transvaginal probe. Therefore, such early ultrasounds are done just to establish the fact of pregnancy. During the procedure the doctor may also identify a number of symptoms which can threaten your pregnancy.

Fetus on the Third Week of Pregnancy

At the third week of an obstetric pregnancy your future kid is still quite small. It’s just a group of cells that carry important genetic information.

However, the process of formation and development is already underway. When you are 3 weeks pregnant, the fetal size will resemble a hollow ball with a diameter of 0.1-0.2 mm, the cell number will increase to 250. At the third week of pregnancy the embryo is placed in a tiny water pouch, filled with the amniotic fluid. It still receives nutrients not from the woman’s body, but from the yolk-sac. The process of hematopoiesis is going on there.

3 Weeks Pregnant Belly Pictures

Check out what the bellies look like at the third week of pregnancy.

Safety – First!

The 3d obstetric week of pregnancy – is one of the critical moments of its course. For a week after the ovulation it is very essential to guard yourself against stress, fatigue, and strenuous exercise, so as not to put an incipient life at any risk. It is also important not to take potent drugs, particularly antibiotics are contraindicated.

At this stage, the internal organs of a fetus are being formed. Therefore, it is important to protect yourself from any negative factors in the first days of pregnancy.

Share the joy
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  1. 1

    it is quite interesting but what in a situation where you noticed that your wife has conceived is it normal to engage your with sex?

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  3. 4

    What if your not sure that your pregnant but you experienced symptoms like dizziness fatigue nausea and finding foods that you don’t usually eat? Then one day i didn’t eat i can feel something inside my belly and i’m in pain that time. And later after i eat i bleed. A lot. Like a period it lasted for 3 days and on the 4th day i had a brown discharge. Can you give me advice about this?

    • 5

      Hi, Marian!
      Some of the early pregnancy symptoms are very similar to those of PMS. Your bleeding could be a normal monthly period.

  4. 6

    Hi i hope that u will notice my comment
    my last menstruation is nov.20-25.2017 and in dec i missed my period until now and i take pt the other says negativ but the other ses positive coz the secind line is really faint so im confused so i decided to go in my ob-gynecologist after the test she says im positive but i insist that i want to do ultrasound to get sure so after my ultra sound the ob say tht im not pregnant because shes hard to find whre the baby is but until now i missed my period but my period is regular i felt so sad to hear that im not pregnant. pls help me with my situation should i request another ultrasound ??

    • 7
    • 8

      Too early for ultrasound .. hcg blood test
      Would’ve more accurate the ultrasound at this point .. def pic up the hcg and give the amount that is there to determine weeks pregnant

  5. 9

    Hey, my last period was 11-25-2017. I haven’t gotten it back since then and I have been feeling dizzy fatigued bloated etc lately
    I’ve also had dat milky discharge
    I did 2 home test and they were negative

    Could it be too early for the tests???

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  6. 11

    Hey?my last period was 11/25/2017..dec 20th I took pregnancy test and it was faint positive. 31st Dec I had little bleeding then spotting for 3days..8/1/2018 i did scan but it was clear no G Sac seen,no fetal pole was demonstrated and the cervix was closed.after 2 days I did pregnancy test again and it was negative….please help

  7. 13

    Why faint positive pregnancy result then bleeding then spotting and finally negative pregnancy result…what could be the problem..did I miscarriage..please help

  8. 14

    Dr says I’m 3 to 4 weeks pregnant, had 2 hcg tests ran, 1st said pregnant, 2nd hcg went down but I’m still pregnant. 1st ultra sound couldn’t find sac, 2nd was vaginal ultra sound , fouls a really small sac but Dr thinks it’s not gonna turn into normal pregnancy and says I’ll probably miscarry on my own, if not then next visit she wants to consult other methods of termination… I believe it’s to early and this could turn around I’m trying to get in somewhere else for 2nd opinion. Is the Dr right? Also I should include I’ve been bleeding this whole time like reg menstrual only a lot of back pain tho… plz help

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    • 16

      Get 2nd opinion. All bleeding isn’t bad unless it is hard bleeding followed by cramps ect. I bled when I was pregnant and my son is 10 now and I have an year old and pregnant again. Good luck

  9. 17

    Iam 46.
    I had my last period on Jan 26.
    I had unprotected sex on Jan 31. I took an ipill on Feb 2.
    I was to have my periods on Feb 24 and March 25. I did not have my periods for Feb and March months.
    I did 3 home pregnancy tests and they were negative. I then did beta HCG tests twice after consulting with doctor. Even that was negative. I had a brown discharge about 2 weeks after taking ipill. My breasts felt tender and itchy. I had stomach cramps in March 2nd week.

    The doctor has prescribed primolut n for 5 days…twice a day.

    I’m worried because I heard this medicine postpones periods. And read about a lot of side effects.
    Am I pregnant? What must I do to get my periods.

    • 18

      You’re hardly pregnant, considering all these negative results. However, only a health professional can tell you why your periods have suddenly stopped. You’ve told that you did consult a doctor – did they come up with any assumption?

  10. 19

    I could need some reassurance. Last Thursday I had three positive test. I went to see my doctor and he said he can’t see pregnancy, just thick uterus and something that appears as a yellow body on the right ovary. He told me to see him tomorrow because he suspects it could be ectopic pregnancy. I have no pain, just slight, not specially painful cramping. Could it be only too early to see on an ultrasound?

    • 20

      Hi Sumeja!
      Try not to worry too early. If the doctor suspects it’s an ectopic pregnancy it doesn’t mean they’ll confirm one. Sometimes even doctors are wrong. Let’s hope that everything is okay with you and your baby will be born in perfect health!

  11. 21

    I’ ve missed my period for a week now. I did home preg test and it was positive. I feel non continuos lower abdominal cramps and I can also feel my cervix with my middle finger just half it. Is it normal with that? and what must I do if is not normal?

  12. 22

    Hey…my last period was on 7 august 2018 till now it havnt came back…m suffering from cold n cough…and i also did 2 home pregnancy tests from prega news but both were negative…i m also getting that white discharge but now I’m little tensed from the result m I pregnant or not…or it’s too early for the test n all..or i shud wait for some more time…please suggest me something what should I do…waiting for your reply

    • 23

      You can get another home pregnancy test done a bit later or take a HCG blood test. It is more accurate. It will help you to find out whether you are pregnant or not.

  13. 24

    I had sex with my bf on 31st Aug 2018. That was the 11th day of my cycle he had come earlier from the first round and the second time he didn’t cum but I know he had a pre cum. I’m worried I could be pregnant from the pre cum . My next period is either 21st or 22nd sept 2018. We used a condom the first time though.

  14. 25

    I had sex in ma first safe days of after periods then I again had sex when da safe day are done like on da sixthday till now am worried cause my boobs re swollen and paining,i have some pain in da abdomen even my heart beats at a high rate… Bt I think am pregnant,is t true or nt??

  15. 27

    My periods are 8 days log and my cycle is 25 days…. my supposed ovulation date was 12/15/18 my period is due 12/29/18…..I had sex on 12/13, 12/15, 2 times on 12/16……my breast are heavy and painful (discomfort). What are the chances that I am pregnant?

  16. 29

    What if you get a vaginal ultrasound for something 6 days before period is due not knowing you’re pregnant. At 3 weeks 1 day, if pregnant can you see anything???

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