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.
Therefore, doctors suggest that young women who are sexually active should have a pap smear every year. Women should have a pap smear by the age of 18, and sooner if they have had had sexual relations. These tests should take place every year once sexual activities begin.After three such negative tests are taken, women can slack off and have a Pap smear every three years.herefore, doctors suggest that young women who are sexually active should have a pap smear every year. Women should have a pap smear by the age of 18, and sooner if they have had had sexual relations. These tests should take place every year once sexual activities begin.