NORMAL MENSTRUAL CYCLE
Menarcha: That's the time the 'little girl' grows up Menstruation begins but usually no egg Is released for the first year or two. Age: anywhere from 9 to 17. It varies enormously, so don't be worried If the girt isn't conforming to her peers' pattern. Time cures most problems.
Sex organs: These take on enormous changes in a short time, St they gear up for a 30-year term of active reproduction. What a terrifying thought! But it's a fact of life, and totally normal. All sex organs, those external plus the ones you can't see. rapidly develop under hormonal influence.
Oestrogen: This Is the main female sex hormone. It helps change the reproductive system into a workable unit. Also, every month it exerts of establishing a pregnancy.
Progesterone: This is the other important female hormone. It Is at its highest level in the ten-day Interval immediately preceding a menstrual bleed. Like oestrogen, it is aimed at gearing the system to receive a fertilized egg.
Conception: This may occur soon after ovulation, generally considered to be the 14th day before the expected onset of the next menstrual bleed—it can be worked out on a calendar if menstrual periods are regular. Sperm meets ovum in the Fallopian tube.
Heredity: At conception, In an instant, hereditary traits are established, and wilt stay this way for the rest of the bub-to-be's life. It's a sobering thought. Also, the baby’s sex is determined at the same moment.
Choosing bub's sex: It sounds too good to be true. Bui several documented methods are claimed to help couples choose their baby's sex. It offers intriguing possibilities for the future.
Gene mopping: Much can be learnt about the baby long before it Is due to be born. Genetic mapping is the up-coming star on the horizon. With amniocentesis, the risk of the baby having certain diseases can now be worked out accurately. But gene mapping will enable doctors to know a great deal more: probably including the risks of heart disease and cancer, the western world's two major killers.
Pregnancy tests: Radio-immunoassay has brought speed and reliability to diagnosing pregnancy, often within days (probably hours) of conception taking place.
Menstruation: It is a simple, normal process, but behind it is a complex mechanism about which we're still making discoveries.
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Women’s health
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