Atwal GS, Manku LK, Griffiths CE, Polson DW. Striae gravidarum in primiparae. British Journal of Dermatology. 2006 Nov 1;155(5):965-9.
Barankin B, Silver SG, Carruthers A. The skin in pregnancy. Journal of cutaneous medicine and surgery. 2002 May;6(3):236-40.
Calvert JP, Crean EE, Newcombe RG, Pearson JF. Antenatal screening by measurement of symphysis-fundus height. Br Med J (Clin Res Ed). 1982 Sep 25;285(6345):846-9.
Edwards RK, Richards DS. Preinduction cervical assessment. Clinical obstetrics and gynecology. 2000 Sep 1;43(3):440-6.
George AO, Shittu OB, Enwerem E, Wachtel M, Kuti O. The incidence of lower mid-trunk hyperpigmentation (linea nigra) is affected by sex hormone levels. Journal of the National Medical Association. 2005 May;97(5):685.
McFarlin BL, Engstrom JL, Sampson MB, Cattledge F. Concurrent validity of Leopold's maneuvers in determining fetal presentation and position. Journal of Nurse-Midwifery. 1985 Sep 1;30(5):280-4.