The sex of a baby is determined by the two sex chromosomes inherited from the parents. A baby will normally inherit one sex chromosome from the mother, and one from the father. A woman has two X chromosomes, so she can give either of her X chromosomes.The father can give either his X or Y chromosome. girl baby will result if the final arrangement is XX, and a boy will result if it is XY. As you would expect, about half of the sperm cells contain an X chromosome, and half contain a Y chromosome. It is possible to have an abnormal number of sex chromosomes, however, this is extremely rare.
So the old recommendation of when to begin Pap smear testing has changed. This testing should start either at age 21 or three years after the start of sexual activity. (âPrematureâ Pap smears can pick up minimal changes that wonât result in cancer, but will cause concern and lead to extensive, unnecessary testing.). So, for a young teenager who is not sexually active, her first visit to a gynecologist need not include a Pap smear. But other important health issues should be addressed at this critical juncture between adolescence and adulthood.
you should start cervical cancer tests at age 21 women between ages 21 and 29 should have a pap test every 3 years women between the ages of 30 and 65 should have a pap test plus an hpv test every 5 yearsalternatively you could continue hainge a pap test alone every 3 yearsow often you should get a pap test depends on your age the first pap test is recommended at age 21 regardless of sexual history or sexual activity from ages 21 to 29 it s recommended that you have a pap smear every three years