ABSTRACT
Oligomenorrhoea is a term that defines menstrual periods that occur repeatedly at intervals between 6 weeks and 6 months. It is an arbitrary definition and may be misleading. It is considered that the normal menstrual cycle has an upper limit of 35 days. The proliferative phase, that is, the time during which the follicle (the egg) develops, is the variable part of the cycle. The secretory or luteal phase is the time from ovulation to menstruation, which is usually constant at 14 days. Cycles of 6 weeks’ duration seem to show no difference from normal-length cycles in regards to follicular and hormone development.
