Missing periods is one of the first signs of predicting your pregnancy in a natural way. This is because the various hormonal changes that happen in the body after conception restrict menstrual cycle. To be precise the body starts to secrete hCG or human chorionic gonadotropin hormone which stops menstruation for the duration of your pregnancy. In the general scenario during the monthly cycle of a woman an ovum starts to mature in one of her two ovaries. The blood-rich lining of the uterus also thickens due to the hormone progesterone produced by the ovaries. After a fortnight ovulation occurs