Notice the time line at the periphery. Preantral period: It takes 300 days for a recruited primordial to grow and develop to the class 2/3 (0.4 mm) or cavitation (early antrum) stage. Atresia can occur in preantral class 1, 2, and 3 follicles.
Best Answer: Hypercholesterolemia (literally: high blood cholesterol) is the presence of high levels of cholesterol in the blood. Hyperlipidemia is an elevation of lipids (fats) in the bloodstream. These lipids include cholesterol, cholesterol esters (compounds), phospholipids and triglycerides. Hyperlipidemia is caused by an elevated level of any kind of lipid (fat) in the blood stream, while hypercholesterolemia is only caused by high cholesterol in the blood stream. Source(s): izzy Â· 8 years ago
Triglycerides, a type of fat in the blood, are different from cholesterol, but because of their strong association with heart disease, triglycerides are measured as well. Often it is both the LDL and triglycerides that are elevated in hyperlipidemia.holesterol is carried through the blood to cells by lipoproteins that are either low density (LDL) or high density (HDL). Think of the lipoprotein as the vehicle and cholesterol as the passenger. HDL is the good lipoprotein because it carries extra cholesterol back to the liver where it can be eliminated.