Salivary oestriol to progesterone ratio in relation to spontaneous labour.
D004964:Estriol / Q000032:analysis*; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy; D011374:Progesterone / Q000032:analysis*; D012463:Saliva / Q000032:analysis*
D011374:Progesterone; D004964:Estriol