Implantation suppression is typically used in the context of medical procedures, where a woman's ability to conceive is intentionally limited or eliminated. The antonyms of this phrase, therefore, would relate to actions or treatments that encourage implantation or pregnancy. These could include fertility treatments, such as in-vitro fertilization, intrauterine insemination, or ovulation induction. On the other hand, natural methods to promote implantation would include living a healthy lifestyle, taking prenatal vitamins, tracking ovulation, and ensuring a fertile environment through adequate hydration and nutrition. In other words, while implantation suppression may be necessary or desired in certain situations, there are a variety of other options available for those seeking pregnancy or fertility.