Nurse midwives function as primary healthcare providers for women and most often provide medical care for relatively healthy women, whose health and births are considered uncomplicated and not "high risk," as well as their neonates. Often, women with high risk pregnancies can receive the benefits of midwifery care from a nurse midwife in collaboration with a physician. Nurse midwives may work closely or in collaboration, with an obstetrician & gynecologist, who provides consultation and/or assistance to patients who develop complications or have complex medical histories or disease(s). Nurse midwives practice in hospitals and private practice medical clinics and may also deliver babies in birthing centers and attend at-home births. Some work with academic institutions as professors. They can prescribe medications, treatments, medical devices, therapeutic and diagnostic measures. Nurse midwives can provide medical care to women from puberty through menopause, including care for their newborn (neonatology), antepartum, intrapartum, postpartum and nonsurgical gynecological care, in some cases, nurse midwives may also provide care to the male partner, in areas of sexually transmitted diseases and reproductive, of their female patients. Currently 2% of nurse-midwives are men. There are 37 midwifery associations in Canada.