Final answer:
Prepu development in fetuses refers to the different stages of prenatal development, from the pre-embryonic stage to the fetal stage until birth. Ricci's genetic contributions are not clear. Genetic studies on fetal development involve examining how genetic and environmental factors affect the fetus.
Step-by-step explanation:
a) Prepu development in fetuses: The period of time required for full development of a fetus in utero is referred to as gestation. It can be subdivided into distinct gestational periods. A developing human is referred to as an embryo during weeks 3-8, and a fetus from the ninth week of gestation until birth. During the fetal stage, the size of the fetus generally increases linearly until the last week or two before birth.
b) Ricci's genetic contributions: There is no clear information provided about Ricci's genetic contributions in the given context.
c) Genetic study on fetal development: Genetic and environmental factors can affect fetal development. The developing fetus is completely dependent on the mother for life. Routine prenatal care and good maternal health during pregnancy is important for reducing the risk of complications to the mother and fetus.