4 Weeks Pregnant: Your Pregnancy Week-by-Week

    4 Weeks Pregnant

    Every future mom, right after finding out she is 4 weeks pregnant, wants to learn as much about her pregnancy as possible. So how does your future baby develop and what are the symptoms that can be noticed during this time?

    Obstetric pregnancy estimation states that on the fourth week of pregnancy an embryo only starts its journey “home”. It will have to work its way through many arduous ways before it reaches its place where the amniotic sac will start forming — and this is where the fetus will spend next eight and a half months. One of the dangers of this period is the risk of ectopic (extrauterine) pregnancy. It happens when the embryo doesn’t reach its final point of destination in time and starts developing right in the birth canal. In most cases, there are certain preconditions that make this happen. The good news is the ectopic pregnancy is quite rare, so you don’t have to worry about this too much. The most important thing for you right now is to take it easy and enjoy every single moment of your pregnancy.

    The fourth week of pregnancy is the period of the placenta formation. Its main task is transporting all nutritional substances into your baby’s body. At the very start, it’s formed from your fetus’ tissues with the help of your own body cells. Let’s see the way it functions.

    A little bit later during the fourth week of pregnancy the placenta starts getting thicker; this process doesn’t stop till the fourth month of pregnancy.
    The placenta supplies your baby with all the necessary nutrients; and what’s more, it gives your baby the special substances necessary at certain points of its prenatal development.

    Although the placenta consists of your tissues and the embryo tissues, it prevents the possibility of direct contact between your and your fetus’ blood flow.

    4 weeks pregnant: symptoms

    There are several ways to detect pregnancy signs during the fourth week. The first one is delayed period, depending on your cycle. In case your period is late, even if it’s only for a day, you can do the pregnancy test: the result accuracy will be up to 98%.

    If you decide to see your gynecologist, the doctor will be able to notice some changes in the color and texture of your cervix, but at this point, he will hardly be able to say you are definitely pregnant.

    It’s still too early to do the ultrasound test because the fetus is still on its way to its place in your womb. This kind of test will be okay to do when you approach the 8th week of pregnancy.

    Possible feelings

    Since every woman’s body is absolutely unique, every mom-to-be experiences different sensations during this period. They can include:

    – drowsiness;
    – apathy;
    – increased fatigability;
    – mood swings;
    – soreness of breasts or lower abdominal pain;
    – nausea;
    – increased appetite.

    Fetal development

    Right now your baby is as big as a poppy seed; her height is about 0,36-1mm and the weight is about 0,5g.

    All the time till the 4th week of pregnancy the fetus looks pretty much like a flat layered disk. But now it goes through some changes gradually turning into an embryo. Its width is not more than 1mm and length is not more than 0,36mm. The placenta and amniotic fluid start forming. It’s quite amazing, but it’s also the time when your future baby’s head starts taking shape too. Among the fetal tissues, there are three tissue layers that are directly involved in the formation of brain, thyroid, pancreas, blood, muscles and skeleton: ectoderm, endoderm, and mesoderm.

    Every week of your pregnancy is special; it’s like discovering the whole new world of unique sensations and experiences. Feel free to share yours with us!


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