Some breast implants can be used for both breast growth and for normal menstruation. Others, however, cannot. This does not mean that the implants are not effective; rather, there are two important aspects: The effectiveness is dependent on the type and size of the implant. The efficacy of implants depends upon the method of implant placement. What is the difference between them? For this article, I will refer to the type of implants as a Bikini Bumper, an Anechoic (Bikini-shaped) Breast Implant, a Pan-Ectropic (Ectropic) Breast Implant, and a T-shaped (Tapered) Breast Implant. The types of implants have been created to address the different breast types. To understand the type of breast implants, we first need to look at what breast types the breasts are actually made from. The breasts are made up of 4 distinct types of cells: The nipple: the most common type of breast, consisting of one large, round nipple. The largest and most prominent breast is the C cup, or A cup, but there are some C cup shapes. The A cup is the most popular shape in women who have larger breasts than a D cup, or DD cup. The B cup is a cup that is slightly smaller than a C cup, and is considered a more "puffy" shape. The D cup is a slightly smaller cup, usually used by women with a smaller bust.