What changes does the fetus undergo at week 3?
By this time, the implantation process is completely completed and the fetal egg is implanted into the uterine wall. On the spot where the placenta will be located in the future , villi form, and in each of them begins to grow capillary. It is this structure that gives rise to a child's place, which begins to form from 5-6 weeks.
If we talk about what happens directly to the future baby at the 3rd week of pregnancy, it is worth noting that at this time he is completely different from the person. Its size does not exceed 0.15 mm and externally the embryo resembles the shape of the auricle that forms inside the fetal bladder.
The second stage of gastrulation, which is characterized by the formation of embryonic sheets, continues. At this time, the formation of a neural tube, a neural crest, a chord, from which axial organs are formed in the future, is noted. At the same time, a bookmark of the future cardiovascular system (vessels, heart), preferences (pronephros) is marked.
At the third week of frailty, the embryo has the beginnings of future vertebrae, pens and legs, brain, intestine, lungs. There is a spreading of the so-called oropharyngeal membrane, in the place of which the mouth is formed in the future.
What happens to the future mother?
At this time the woman expects the onset of the next menstrual days, so often the first signs perceive as manifestations of premenstrual syndrome:
- nausea;
- a violation of appetite, the appearance of strange taste preferences;
- intolerance to harsh odors;
- weakness;
- irritability.
To learn about conception at this time, you can use an ordinary pregnancy test.