Pregnancy and motherhood have been a subject of several studies in recent years. In fact these are as ancient as humanity. Pregnancy is indispensable to life, ensuring the continuity of human life (Faisal-Cury & Menezes, 2006). Vellay (1998) states that this is considered one of the most important phases of woman's sexuality and should be part of her life as a happy event and not as bad memory. Being a mother is one of the most important events of a woman's life, so that motherhood presents both a challenge to woman's maturity, as an opportunity for the development of new family and social responsibilities (Cordeiro, 1994).

The phase of differentiation, which corresponds to the second trimester of pregnancy, is characterized as the most stable period over the psychological gestation period. At this stage, the perception of fetal movements and therefore recognize the fetus as a separate being (Pacheco, Figueiredo, Costa & Country, 2005). Finally, the third quarter, or separation phase, is characterized by the satisfaction of ending a successful gestation, but also by an increase in anxiety resulting from the approach of delivery (Pacheco et al, 2005). Lamb (1986) states that pregnancy is considered as a development crisis, adaptation to all changes that occur in the life of pregnant women. These changes are at body, psychological and family.

In addition to pregnancy there are other phases of developing women's life, such as puberty and menopause, which involve processes of adaptation to the new situation. However, pregnancy involves profound psychological and somatic changes, constituting the most relevant turning point of the personality of the woman's life. Lamb (1986) Considers that the desire to become pregnant and pregnancy represent the achievement of what the deeper one in the psychologically matured woman.

For all this, pregnancy requires additional synthesis and reorganization effort of stability, from which there can be an increase in vulnerability capable of constituting a risk factor for the woman's mental health (Colman & Colman, 1994).