No. Endometriosis is a possible cause of female infertility. However, this does not mean that all women with endometriosis will have fertility problems.
The difficulty in achieving pregnancy will depend on the degree of severity of the endometriosis and the different areas affected by the presence of endometrial tissue. It is not the same to have a grade I endometriosis as it is to have a grade IV endometriosis, where it is most likely that you will have to resort to ovodonation to fulfil your desire for motherhood.