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Ovulation is the central event of the ovarian cycle. It is followed
after a time of about 2 weeks (can range from 11 to 16 days) by
menstruation. The behaviour of the reproductive organs during
the ovarian cycle is controlled by several hormones, in particular
the pituitary hormones (follicle stimulating hormone and luteinizing
hormone) and the ovarian hormones (oestrogen and progesterone).
This behaviour is captured in the following animation. There are
two simulated fertile cycles, in the first cycle pregnancy does
not occur, in the second cycle pregnancy occurs.
Familiarise yourself with the female reproductive organs as shown
in the diagram below, then click
here to load and run the animation.
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