The pressure decreases because there is less density meaning there are less atoms or molecules in a space. Gravity determines the density by pulling in more molecules towards â¦ the center of the Earth.
Therefore, about 85-90 percent of children with hereditary retinoblastoma develop multiple tumors that affect both eyes (bilateral disease). The remaining 10-15 percent of patients with hereditary retinoblastoma develop only a single eye tumor (unilateral disease).
How do sexually transmitted diseases and sexually transmitted infections (STDs/STIs) affect pregnancy? STDs/STIs pose special risks for pregnant women and their infants. If a mother has an STD/STI, it is possible for the fetus or newborn to become infected. Some STDs/STIs, including chlamydia, gonorrhea, genital herpes, and cytomegalovirus can be passed from mother to infant during delivery when the infant passes through an infected birth canal. A few STDs/STIs, including syphilis, HIV, and CMV, can infect a fetus before birth during the pregnancy. It is important for a pregnant woman to be tested for STDs/STIs, including HIV/AIDS and syphilis, as a part of her prenatal care.