Characteristics and Examples of Fossil Formation. The many different ways organisms are preserved gives fossils different characteristics. Let's explore a few ways fossils can form. Permineralization is when an organism dies and sediment enters the body, filling in the pores of a leaf, or a bone or a shell.
As you can see, for 2 people with Down syndrome having babies, the chances are as follows: -25% chance their child will be typical (no Down syndrome). -50% chance their baby will have Down syndrome. -25% chance there will be no viable pregnancy.
Risks to your baby. The miscarriage rate is 10 percent, only slightly higher than for women five years younger. At age 25, your chances of delivering a baby with Down syndrome are 1 in 1,250, and there's a 1 in 476 chance of having a baby with any chromosomal abnormality.et more infants with these disorders are born to women in their 20s because those in this age group have more babies and women past 35 are more likely to be offered screening tests and may elect to terminate a pregnancy in which the fetus has a birth defect.