References
- Nwokocha ARC. Adolescence and associated problems. In: Azubuike JC, Nkanginieme KEO. (eds) Paediatrics and child health in a tropical region. Owerri: African Educational Services, 1999; 97–109.
- Sizonenko PC. Endocrinology in preadolescents and adolescents. Am J Dis Child 1978; 132: 104–112.
- Swerdloff RS. Physiological control of puberty. Med Clin NorthAm 1978; 62: 351–360.
- Ebling FJP. The neuroendocrine timing of puberty. Reproduction2005; 129: 675–683.
- Palmert ML, Boepple PA. Variation in the timing of puberty: clinical spectrum and genetic investigation. J Clin Endocrinol Metab 2001; 86: 2364–2368.
- Anne-Simone P, Grete T, Anders J, Niels ES, Jorma T, Bourguignon JP. The timing of normal puberty and the age limits of sexual precocity: variations around the world, secular trends, and changes after migration. Endocrinol Rev 2003; 24: 668–693.
- Marshal WA, Tanner JM. Variations in pattern of pubertal changes in boys. Arch Dis Child 1970; 45: 13–23.
- Adekile AD. Haemoglobinopathies. In: Azubuike JC, Nkanginieme KEO. (eds) Paediatrics and child health in a tropical region. Owerri: African Educational Services, 1999; 194–213.
- Serjeant GR. Sickle cell disease. Oxford: Oxford University Press,1992; 358–360.
- Olusanya O, Okpere E, Ezimokhai M. The importance of social class in voluntary fertility control in a developing country. W Afr Med J 1985; 4: 205–212.
- Araoye MO. Research methodology with statistics for health and social sciences. Ilorin: Nathadex Publishers, 2004; 115–120.
- Adediran A. Sexual maturation of Igbo boys in Enugu (Dissertation). Ijanikin: National Postgraduate Medical College of Nigeria, 2002; 42–47.
- Cantu JM, Scaglia HC, Medina M. Inherited congenital normo-functional testicular hyperplasia and mental deficiency. Hum Genet 1976; 33: 23.
- Chipkevitch E. Clinical assessment of sexual maturation in adolescents. J Pediatr ( Rio J) 2001; 77(Supl. 2): S135–S142.
- William AD, Ronald AF, Patricia HP, Wayne DB. Testicular volumes of adolescents. J Pediatr 1982; 101: 1010–1012.
- Emodi I. Physical and sexual development in children with sickle cell anaemia (Dissertation). Ijanikin: National Postgraduate Medical College of Nigeria, 1989; 30–56.
- Ozigbo CJ, Nkanginieme KEO. Body mass index and sexual maturation in adolescent patients with sickle cell anaemia. Nig J Paediatr 2003; 30: 39–44.
- Oyedeji GA. Delayed sexual maturation in sickle cell anaemia patients: observation in one practice. Ann Trop Paediatr 1995; 15: 197–201.
- Singhal A, Thomas P, Cook R, Wierenga K, Serjeant G. Delayed adolescent growth in homozygous sickle cell disease. Arch Dis Child 1994; 1: 404–408.
- Abasi AA, Prasad AS, Ortega J, Congco E, Oberleas D. Gonadal function abnormalities in sickle cell anaemia: studies in adult male patients. Ann Int Med 1976; 85: 601–605.
- Mann JR. Sickle cell haemoglobinopathies in England. Arch Dis Child 1981; 56: 676–683.
- Jimenez CT, Scott RB, Henry WL, Sampson CC, Ferguson AD. Studies in sickle cell anaemia. XXVI. The effects of homozygous sickle cell disease on the onset of menarche, pregnancy, fertility, pubescent changes and body growth in Negro subjects. Am J Dis Child 1966; 111: 497–504.
- Ezeome ER, Obanye RO, Onyeagocha AC, Achebe LN, Chigbo J, Onuigbo WI. Normal pattern of pubertal changes in Nigerian boys. W Afr Med J 1997; 16: 6–11.
- Matsuo N, Anzo M, Sato S, Ogata T, Kamimaki T. Testicular volume in Japanese boys up to the age of 15 years. Eur J Pediatr 2000; 159: 843–845.
- Campbell BC, Gillett-Netting R, Meloy M. Timing of reproductivematuration in rural versus urban Tonga boys. Zambia Ann Hum Biol 2004; 31: 213–227.
- Yeniolu H, Gfivenc H, Aygiiin AD, Kocabay K. Pubertal development of Turkish boys in Elazig, Eastern Turkey. Ann Hum Biol 1995; 22: 337–340.
- Konotey-Ahulu FID. The sickle cell disease patient. London: Tetteh-A'Domeno Company, 1996; 189–197.
- Ashcroft MT, Serjeant GR, Desai P. Heights, weights, and skeletal age of Jamaican adolescents with sickle cell anaemia. Arch Dis Child 1972; 47: 519–524.
- Biro FM. Pubertal staging in boys. J Pediatr 1995; 127: 100–102.
- Papadimitrou A. Timing of sexual maturation (letter). Pediatrics 2004; 113: 177–178.
- Cameron N, Grieve CA, Kruger A, Leschner KF. Secondary sexual development in rural and urban South African black children. Ann Hum Biol 1993; 20: 583–593.