Although modern pregnancy tests are so sensitive that they can define the pregnancy at the 4th week, it is necessary to remember that the result depends on the concentration of hCG in the urine. For more precise answer it is recommended to conduct a pregnancy test in the fifth week of pregnancy, when the content of this hormone in the urine has reached the required level.

At this period, and even before, as well as in the process of preparing for pregnancy, doctors recommend taking folic acid. Folic acid is a vitamin B9, which is involved in the synthesis of many essential amino acids and nucleic acids which are necessary for the formation of healthy eggs in the female body, and movable healthy sperm in the male body, the proper formation of the fetus, stimulates the hematopoietic function of bone marrow of the expectant mother, has definitely positive influence on the formation and development of the baby’s nervous system, most of its organs and tissues.

You can also start taking vitamins for pregnant women, which will be useful for the development of the child and the expectant mother, enhancing her body.

At the end of the 4th week, the embryo size is approximately 0.4-1 mm. It looks like a grain of sand. This is a very important period, because the formation of the rudiments of the most important organs and embryonic membranes starts exactly at the end of the 4th week. If the pregnancy is achieved through assisted reproductive technologies such as in vitro fertilization (IVF), a woman takes two weeks of maintenance therapy with progesterone.