Pregnancy Week 4

If you are usually set as a clock, a delay in your period can give you a warning signal during your pregnancy week 4. But to get confirmation, take a home pregnancy test or visit your OB to get a blood test done.

The tiny being inside your body is still called an “embryo”, but it grows very fast. The rapidly dividing ball of cells – now known as Blastocyst – has separated into two parts.

Symptoms Of Pregnancy Week 4

Yes, a pregnancy test will already show two lines in the first few days of a missed period. Congratulations! At this stage, you may start experiencing symptoms of bloating, sore breasts, nausea and vomiting, and a frequent need to urinate. 

Early symptoms of pregnancy may include abdominal pain or cramps, and some women may notice very slight bleeding or spots at the time of implantation. The body produces increased levels of hCG hormone during the first few weeks, certain women may feel dizzy and can even faint.

Baby Development

The baby’s development is still in the very early stages at the cellular level. Pregnancy week 4 will, therefore, mark the onset of the embryonic period: the inner group of cells will become the embryo and the outer group will become the cells that nourish and protect it.

Blood vessels develop and help to carry blood, oxygen, and nutrients from mother to baby. Inside your womb, the placenta and amniotic sac which will later nourish and protect your embryo also start to form. Your baby’s size is that of a poppy seed.

In the case of twin pregnancy, the kind of identical twins is determined based on the time of the fetal egg division.

  • Dichorionic-Diamniotic twins each have their own placenta and amniotic sac (the fetal egg is divided on days 1-3 after fertilization).
  • Monochorionic-Diamniotic twins are identical twins who share a placenta but not an amniotic sac (the fetal egg is divided on days 4-8).
  • Monochorionic-Monoamniotic twins are identical twins who share both a placenta and an amniotic sac (the fetal egg is divided on days 8-13).
[CC BY 3.0], via Wikimedia Commons

Pregnancy Week 4: What To Do?

If the pregnancy test is positive, your gynecologist will prescribe a blood test to confirm the result. You can also ask your doctor about scheduling an ultrasound scan.

Pregnancy week 4 is definitely time to tell future daddy the news. Plan a little romantic evening and let him know he’s going to be a father. You can choose to wait a few more weeks before announcing it to the world. It is also a good time to start reading about what to expect next.

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