The phrase "egg implants" refers to the process of inserting a fertilized egg (embryo) into a woman's uterus in order to help her get pregnant. Full definition
A few weeks earlier, I'd been diagnosed with a life - threatening condition called ectopic pregnancy — a fertilized egg implanted in the wrong part of the body. (entrepreneur.com)
Less hCG is released if the fertilized egg implants in a place other than the uterus, such as in a fallopian tube. (webmd.com)
An estimated twenty percent of women will experience bleeding when the fertilized egg implants into the uterus. (doctor-info.website)