Menstruation.
Stops. There may be slight spotting, which indicates that the embryo is implanting in the uterine mucosa.
Woman's behavior.
Irritability or tearfulness may appear. Many women pay attention to changes in taste preferences, and a different perception of smells appears.
External signs.
Little noticeable. Some women may experience pigmentation and the first stretch marks on their abdomen by the end of 1 month of pregnancy.
Pain.
A pregnant woman may feel pain in the lower abdomen as the fertilized egg approaches the uterus.
Child development stage.
Embryo.