The age of the fetus at 3 weeks of gestation is only one week from the beginning of the entire pregnancy. The egg, which was safely fertilized, does not cease to divide and follow the place of its attachment. The fetus in the 3rd week of pregnancy has the shape of a mulberry, so some gynecologists call it a morula.
Fetus at the 3rd week of pregnancy
Slowly but steadily, the shape of the embryo becomes spherical, and the cavity of the formed ball is filled with liquid. The outer layer is intended to be attached to the uterine wall, while the inner layer is intended to be an embryonic disc. Some time later the embryo will become more elongated, its body will extend and expand in the lower part. At pregnancy in 3 weeks the size of a fetus will allow an embryonic disk to curtail in a tubule, as a result of which the head starts to form from the wide end, and from the narrow one - the coccyx. Sex cells are already beginning to form.
At 3 weeks the fetus begins to attach to the wall of the uterus, for which the blastocyst clears the upper layer of tissues, making a small depression. This process is also called implantation and takes about 40 hours. Throughout this time, a woman can observe the minimum discharge of blood, which is the norm.
Fetal size in 3 weeks
In 3 weeks, the size of the fetus is constantly increasing, which leads to the depletion of its internal reserves. Right now there comes a time when he begins to completely depend on the strength of the mother's body,
The size of the fetus at the 3rd week of gestation contributes to the production of a special hormone - progesterone . It is he who is responsible for the production of a specific uterine mucus, which will subsequently turn into a placenta - a vital temporary organ. The size of the fetus at three weeks gestation is only 2 mm in length. It consists of approximately 250 cells, which relentlessly divide.
The woman herself rarely thinks about what kind of fruit is in 3 weeks, since she does not even know about her new position.