General practitioner obstetrics.

1 Bowling A. Injuries to dancers: prevalence, treatment, and perception of causes. BrMedJ 1989;298:731-4. (18 March.) 2 Drinkwater BL, Nilson K, Chesnut CH III, Bremner WJ, Shainholty S, Southworth MB. Bone mineral content of amenorrheic add eumenorrheic athletes. N EnglIJ Med 1984; 311:277-81. 3 Marcus M, Cann C, Madvig P, et al. Menstrual, function and bone mass in elite woman distance runners: endocrine and metabolite features. Ann Intern Med 1985;102:158-63. 4 Fisher EC, Nelson ME, Frontera WR, Turksoy RN, Evans WJ. Bone mineral content and levels of gonadotropins and estrogens in amenorrheic running women. J Clin Endocrinol Metab 1986;62:1232-6. 5 MacConnie SE, Barkan A, Lampman RM, Schork MA, Beitins IZ. Decreased hypothalamic gonadotropin-releasing hormone secretion in male marathon runners. N EnglJ Med 1986;315: 411-7. 6 Frisch RE. Fatness and fertility. Scientinc American 1988;258: 88-95. 7 Warren MP. The effects of exercise on pubertal progression and reproductive function in girls. J Clin Endocrinol Metab 1980; 51:1150-7. 8 Warren MP, Brooks-Gunn J, Hamilton LH, Warren LF, Hamilton WG. Scoliosis and fractures in young ballet dancers. Relation to delayed menarche and secondary amenorrhea. N Englj Med 1986;314:1348-53. 9 Horvath C, Holl6 I. Scoliosis and fractures in young ballet dancers. NEngljMed 1986;315:1417-8.