As with any other woman, there is no way to determine what will happen to the breasts after a woman gets pregnant. Previous pregnancies may prove to be some guide but some women will have different experiences with each pregnancy. Breast implants do not influence the breast glands response to hormones. So the glands will respond as they would normally do. The breast skin will typically contract down again afterwards, but it may or may not be a return to the previous shape. No crystal balls.