Month: September 2019

menstruation

      When a girl child is born, her ovaries already contain many thousands of immature ova (or eggs) which are contained in a immature follicles. When a girl reaches the age of puberty or she was sexually mature, then one follicle develops at a time to form a mature ovum (or egg). On maturing, the …

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embryo

      When the ovum (or egg) is fertilised in the oviduct, then a zygote is formed. The zygote divides rapidly by mitosis as it moves down slowly in the oviduct and forms a hollow ball of hundreds of cells. This hollow ball of cells, now called an embryo, sinks into the soft and thick lining …

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