Total urinary oestrogen excretion during normal menstrual cycle and normal pregnancy in Nigerians

Total oestrogens were measured during normal menstrual cycles and during pregnancy in healthy Nigerian women. During the menstrual cycle, maximum excretion was consistently observed in the luteal phase in contrast to findings in European and American populations. During pregnancy, oestrogen excretion was similar to that reported amongst Europeans only in early pregnancy; oestrogen excretion did not show the usual rapid rise in late pregnancy.