The vital spark.
D004967:Estrogens / Q000652:urine; D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D006854:Hydrocortisone / Q000502:physiology; D007745:Labor Onset; D007743:Labor, Obstetric; D010121:Oxytocin / Q000502:physiology; D011247:Pregnancy; D014590:Uterine Contraction
D004967:Estrogens; D010121:Oxytocin; D006854:Hydrocortisone