1. Enfermedades dermatológicas;Guerra Tapia,2001
2. Endocrinological changes of pregnancy;Cascy,1985
3. Placental hormones, hormonal preparation for and control of parturition, and hormonal diagnosis of pregnancy;Buster,1989
4. Immunology of cutaneous disorders of pregnancy;García-González;Inter J Dermatol,1999
5. Physiologic skin changes during pregnancy: a study of 140 cases;Muzaffar;Int J Dermatol,1998