Engaging in sexual activity does not negatively affect implantation. In fact, it can potentially increase the chances of successful embryo implantation. During sexual intercourse, contractions in the uterus help to draw sperm closer to the cervix, increasing the likelihood of fertilization. Additionally, orgasm releases oxytocin, a hormone that promotes uterine contractions and helps move sperm towards the egg. However, it is important to note that if you are undergoing fertility treatments or have specific medical conditions, your doctor may advise against certain types of sexual activity during specific times in your cycle. It is always best to consult with your healthcare provider for personalized guidance.