But pregnant workers without prior immunity should avoid contact with infected children or adults. Workers should also use good hygienic practices such as frequent handwashing to prevent the spread of infectious diseases among workers in elementary schools, nursery schools, and daycare centers. To understand how reproductive hazards can affect a woman's reproductive health and her ability to have healthy children, it is helpful to understand how the female reproductive system works. The main reproductive tissues in women are the ovaries , uterus , and fallopian tubes . The functions of these tissues are largely controlled by hormones produced by the brain and the pituitary gland .
Hormones are chemicals that are formed in the body and circulate in the blood.
These hormones regulate the menstrual cycle, pregnancy, and the production of breast milk. These hormones are responsible for sexual development and for preparing the uterine wall to hold and nourish a fertilized egg every month. These sex hormones also contribute to the basic health of the heart, bones, liver, and many other tissues. A woman is born with all of the eggs that she will ever have. Therefore, if her eggs are damaged or destroyed, she will not be able to replace them.