Counseling by telephone: a toll-free service to improve prenatal care.
D000328:Adult; D000649:Amniocentesis; D003376:Counseling; D004781:Environmental Exposure; D005260:Female; D005817:Genetic Counseling; D030342:Genetic Diseases, Inborn; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D011295:Prenatal Care; D012306:Risk; D019966:Substance-Related Disorders; D013689:Telephone