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
There are two main types of cholesterol that are carried by different types of lipoproteins. Low-density lipoproteins (LDL) are sometimes called âbadâ cholesterol. High levels of LDL cholesterol can build up in your arteries, causing heart disease. High-density lipoproteins (HDL) are referred to as âgoodâ cholesterol.HDL cholesterol carries cholesterol from other parts of your body back to the liver.igh levels of LDL cholesterol can build up in your arteries, causing heart disease. High-density lipoproteins (HDL) are referred to as âgoodâ cholesterol. HDL cholesterol carries cholesterol from other parts of your body back to the liver.